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[ARCHIVED THREAD] - 6.8 case based AR-15 Variants. (Page 1 of 2)
Posted: 10/3/2014 11:39:30 PM EDT
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20x6.8
.22x6.8 6x6.8 .25x6.8 6mm WOA (thanks Yankindachain) 6mm Hagar (thanks Yankindachain) 6DTI (thanks Yankindachain) 6PDK (thanks Yankindachain) 6.5x6.8 Six5 .30x6.8 .30 HRT (thanks Bowhntr6pt) 30 Herrett - ARPerformance version .338 spectre (thanks DBrown) .358x6.8 22DTI 6mm DTI 25 DTI 6.5 DTI all DTI cartridges have 30 degree sholders 5.56x42 6x41 20 PDK 22 PDK 6 MM PDK 6.5 MM PDK American 30 from BHW In barrel lengths from 7.5 to 24 inches. Once a person gets set up reloading the 6.8 SPCII it opens a whole realm of possible variant calibers you can pursue off one case. With a set of Redding bushing dies and the correct bushing sizes creating brass for the variant you chose is fairly easy. Black Hole Weaponry , AR Performance and MPG Customs can fix you up with almost anything you need. For any I missed post in the thread and I will add to the list giving you credit, thank you. |
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The 308 6.8 version from Black Hole is not done with bushings. It uses Herrett dies. It is not an HRT. They don't make a 358 but have contemplated it. The others have all been brought to the mainstream by Black Hole without using custom dies and barrels are available in virtually any configuration. They are the only barrel manufacturer that can provide a barrel in a timely manner per your specifications and have pressure tested loading data to make sure they produce match quality accuracy at safe and sane pressures. We shoot what we produce and work to make yours as good as it can be done at a reasonable price.
Greg |
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The 308 6.8 version from Black Hole is not done with bushings. It uses Herrett dies. It is not an HRT. They don't make a 358 but have contemplated it. The others have all been brought to the mainstream by Black Hole without using custom dies and barrels are available in virtually any configuration. They are the only barrel manufacturer that can provide a barrel in a timely manner per your specifications and have pressure tested loading data to make sure they produce match quality accuracy at safe and sane pressures. We shoot what we produce and work to make yours as good as it can be done at a reasonable price. Greg Thanks Greg |
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The 308 6.8 version from Black Hole is not done with bushings. It uses Herrett dies. It is not an HRT. They don't make a 358 but have contemplated it. The others have all been brought to the mainstream by Black Hole without using custom dies and barrels are available in virtually any configuration. They are the only barrel manufacturer that can provide a barrel in a timely manner per your specifications and have pressure tested loading data to make sure they produce match quality accuracy at safe and sane pressures. We shoot what we produce and work to make yours as good as it can be done at a reasonable price. Greg I think Marty Terweem and a few others beat you and BHW to the punch by a few years. The 30 HRT Marty came up with in 2007 uses 30 Herrett dies just like the ARP 30 Herrett(same as the 30HRT except the shorter case allows for use of longer bullets) and the longer case BHW version. Several people used 6.8 bushing dies to make 22 and 6mm versions on the 6.8 case around 2007 also. The 6mm WOA, 6mm Hagar, 6DTI and 6PDK are other versions that have been around for years. They were all done long ago. |
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.20x6.8 .22x6.8 6x6.8 .25x6.8 6mm WOA (thanks Yankindachain) 6mm Hagar (thanks Yankindachain) 6DTI (thanks Yankindachain) 6PDK (thanks Yankindachain) 6.5x6.8 Six5 .30x6.8 .30 HRT (thanks Bowhntr6pt) 30 Herrett - ARPerformance version .338 spectre (thanks DBrown) .358x6.8 In barrel lengths from 7.5 to 24 inches. Once a person gets set up reloading the 6.8 SPCII it opens a whole realm of possible variant calibers you can pursue off one case. With a set of Redding bushing dies and the correct bushing sizes creating brass for the variant you chose is fairly easy. Black Hole Weaponry , AR Performance and MPG Customs can fix you up with almost anything you need. For any I missed post in the thread and I will add to the list giving you credit, thank you. Add- 22DTI 6mm DTI 25 DTI 6.5 DTI all DTI cartridges have 30 degree sholders 5.56x42 6x41 |
| ARP has the 5.56 x 42mm which is the same as the 22-6.8 only the case is shortened to 42mm so you can seat 75 gr. A-Max without seating past the full diameter portion of the bullet or cutting out the front of the mag so you can seat longer. When shooting other bullets it is exactly the same as the 22-6.8 and is loaded the same with the same ballistics. I get the same velocities with the 5.56x42 as Greg gets with the 22-6.8. |
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I think Marty Terweem and a few others beat you and BHW to the punch by a few years. The 30 HRT Marty came up with in 2007 uses 30 Herrett dies just like the ARP 30 Herrett(same as the 30HRT except the shorter case allows for use of longer bullets) and the longer case BHW version. Several people used 6.8 bushing dies to make 22 and 6mm versions on the 6.8 case around 2007 also. The 6mm WOA, 6mm Hagar, 6DTI and 6PDK are other versions that have been around for years. They were all done long ago. Quoted:
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The 308 6.8 version from Black Hole is not done with bushings. It uses Herrett dies. It is not an HRT. They don't make a 358 but have contemplated it. The others have all been brought to the mainstream by Black Hole without using custom dies and barrels are available in virtually any configuration. They are the only barrel manufacturer that can provide a barrel in a timely manner per your specifications and have pressure tested loading data to make sure they produce match quality accuracy at safe and sane pressures. We shoot what we produce and work to make yours as good as it can be done at a reasonable price. Greg I think Marty Terweem and a few others beat you and BHW to the punch by a few years. The 30 HRT Marty came up with in 2007 uses 30 Herrett dies just like the ARP 30 Herrett(same as the 30HRT except the shorter case allows for use of longer bullets) and the longer case BHW version. Several people used 6.8 bushing dies to make 22 and 6mm versions on the 6.8 case around 2007 also. The 6mm WOA, 6mm Hagar, 6DTI and 6PDK are other versions that have been around for years. They were all done long ago. It is fascinnating when you go back and look at OLD books. The 22X6.8 was basically done by two guys back in the 30's/40's using the 25/30 Remington necked down, shortend and moving the shoulders back. One was done by Lindahl and I believe the other by Donaldson if my memory doesn't fade out. Of course the velocites were nothing like we are seeing thanks to our new powders and higher operating pressures in new firearms. Greg |
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At 26 variants and counting based off the 6.8 SPC case could we say it is the most adaptable AR15 case? Does the 5.56 have more or less variants based off of it? What do you think the reason is so many variants are based off the 6.8 SPC case? I'd say that's a safe bet. The interest in 223 based wildcats and the AR platform is there but there are so many limits. With the fatter 6.8 case we open up a whole realm of calibers that can be pushed well out of the rifles. The 223 head sized case just doesn't have the boiler room to generate what it takes to push the big boys. The 2.26 limiit was very influential early on but now that we can hit 2.3 the 223 based cases have gained some but I don't think they will ever catch up. We already have the17 Remington, 222, 223, 222 Magnum and 204 and between those ther isn't a lot of space to add. The new 25X45 is the new kid, factory, on the block and the various TCU's are adaptable but at days in the 6.8 will win hands down. IMHO Greg |
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One of the civilian Army Ordnance engineers felt that to meet the SCHV requirements, a new case would have been more appropriate based on the 25 Remington, which was a necked down .30 Remington. They were set on a .224 bore, but he felt case capacity was too limited with the .222 Remington based 5.56x45, and he also wanted to use the 68gr bullets with boat tails to retain energy well for the 500yd steel helmet perforation requirement.
That would have required a complete redesign of the rifle around the necked down .25 Rem, and would have stalled AR15 development/production, but it is interesting to see where he was going. McNamara's Whiz Kids shot him down promptly, and the idea died a quiet death. You can read all about it in The Black Rifle, Volume I. A necked down 6.8 to .224 is basically the re-birth of that idea, where some of the engineers wanted to bring the pressures down with case capacity, while being able to increase velocity and use a more efficient projectile with more substantial mass to it. If that idea had followed a natural progression, the rifle would have grown a little bit I think, to include increasing the diameter of the critical pressure containment parts for a FOS of 2, like was achieved with .222 Remington and the AR15 FOS. It might have also generated a slightly larger magazine design, wider and longer mag well, but still could have fit within the AR15 receiver set OAL. That is the direction the AR15 could have gone, and would have then been a great foundation for the development of the SAW in the 1970's. |
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646 yards with a 90 grain Berger out of a 22" BHW rilfe built by RPG. Grerg Picture to follow tomorrow. Quoted:
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IIRC Antelope have been taken at 650 yrd with the 6x68 646 yards with a 90 grain Berger out of a 22" BHW rilfe built by RPG. Grerg Picture to follow tomorrow. well you know how folks like to round up  , used to not like forming 6x68 brass but after finding a couple of great deals on 2 more 6.8 type S dies it's not bad at all
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well you know how folks like to round up , used to not like forming 6x68 brass but after finding a couple of great deals on 2 more 6.8 type S dies it's not bad at allQuoted:
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IIRC Antelope have been taken at 650 yrd with the 6x68 646 yards with a 90 grain Berger out of a 22" BHW rilfe built by RPG. Grerg Picture to follow tomorrow. well you know how folks like to round up , used to not like forming 6x68 brass but after finding a couple of great deals on 2 more 6.8 type S dies it's not bad at allYou can also use a gutted 6.8 die for the first step. Greg |
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At 26 variants and counting based off the 6.8 SPC case could we say it is the most adaptable AR15 case? No. Theoretically, a bigger diameter case would be more adaptable because it could be wildcatted to larger calibers than possible with the SPC case, in addition to all of the same smaller calibers. The most you can correctly say is that it's the parent case of more wildcats than any other AR15 case. (Of course, that's assuming no other AR15 case has spawned a greater number of wildcats.) |
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One of the civilian Army Ordnance engineers felt that to meet the SCHV requirements, a new case would have been more appropriate based on the 25 Remington, which was a necked down .30 Remington. They were set on a .224 bore, but he felt case capacity was too limited with the .222 Remington based 5.56x45, and he also wanted to use the 68gr bullets with boat tails to retain energy well for the 500yd steel helmet perforation requirement. That would have required a complete redesign of the rifle around the necked down .25 Rem... I don't recall ever reading about that necked-down .25 Rem round, but I know Ordnance did develop a 6.35x48mm cartridge (derived from the .25 Rem) to fit the AR15 without a complete redesign of the rifle. 
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No. Theoretically, a bigger diameter case would be more adaptable because it could be wildcatted to larger calibers than possible with the SPC case, in addition to all of the same smaller calibers. The most you can correctly say is that it's the parent case of more wildcats than any other AR15 case. (Of course, that's assuming no other AR15 case has spawned a greater number of wildcats.) Quoted:
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At 26 variants and counting based off the 6.8 SPC case could we say it is the most adaptable AR15 case? No. Theoretically, a bigger diameter case would be more adaptable because it could be wildcatted to larger calibers than possible with the SPC case, in addition to all of the same smaller calibers. The most you can correctly say is that it's the parent case of more wildcats than any other AR15 case. (Of course, that's assuming no other AR15 case has spawned a greater number of wildcats.) Whats wrong with that theory is a larger case requires a lower pressure due to the weaker bolt in an AR15 platform. This is perhaps why the 6.8 case is the parent case of the most AR15 variants. |
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Whats wrong with that theory is a larger case requires a lower pressure due to the weaker bolt in an AR15 platform. Quoted:
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At 26 variants and counting based off the 6.8 SPC case could we say it is the most adaptable AR15 case? No. Theoretically, a bigger diameter case would be more adaptable because it could be wildcatted to larger calibers than possible with the SPC case, in addition to all of the same smaller calibers. The most you can correctly say is that it's the parent case of more wildcats than any other AR15 case. (Of course, that's assuming no other AR15 case has spawned a greater number of wildcats.) Whats wrong with that theory is a larger case requires a lower pressure due to the weaker bolt in an AR15 platform. Negative. There's nothing wrong with the theory. Rounds like .458 SOCOM and .50 Beowulf show that larger calibers are feasible, despite the pressure limitations. Therefore, if the 0.42" SPC case permits wildcats from, say .17 caliber up to .36 caliber, and a 0.44" case allows wildcats from .17 caliber to .38 caliber, then the fatter case is more adaptable. This is perhaps why the 6.8 case is the parent case of the most AR15 variants. Possibly, but I would attribute it to other things, such as the popularity of 6.8 SPC itself, the ability of the SPC case to be necked up to larger calibers than the 5.56 case, and the greater powder capacity of the SPC case relative to the 5.56 case. And that figure of 26 SPC-based wildcats sounds more impressive than it actually is, because some of the listed rounds have negligible differences between them. For instance, 6mm DTI and 6x6.8, or 30 HRT and .30 HRT. |
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Just Google .358 MGP, there's several threads on here and other boards, and there's a website too. Quoted:
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Just out of curiosity what kind of numbers does the 358 version put out. This is the first time I've heard of it. Mikes cat is a real performer. Turns the 6.8 case into ine bad 35cal spitter! Only down sides are that it might not be the best for subsonic use, the mags need some mild massaging & the forming of brass requires fire-forming. To say the least I would like to have one. My cat, dubbed the 35KLR, is a shorter version, like a 300 Whisper/ BLK. Easy to form cases- no mag mods to shoot rifle projos & should perform well subsonic & suppressed. Hope to have a shooter done soon. |
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hey Yama_Raja change it to 6.8 the Most Popular AR15 cartridge Ever to be wildcatted unlike some others , I mean just how many .458 wildcats do you see  I agree Angus6 But as we both know stanc and LRRPF52 posting about the .25 and .30 remington are just trying to derail the point I'm making anyhow. Because neither of those cases pertain to wildcats based off the 6.8SPC, which is what this thread it about. I'm staying out of their threads, they cannot make themselves stay out of mine. They will try to pick everything apart to take focus off what is the truth. The 6.8 SPC case is the single most wildcatted case in the AR15 platform |
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Mikes cat is a real performer. Turns the 6.8 case into ine bad 35cal spitter! Only down sides are that it might not be the best for subsonic use, the mags need some mild massaging & the forming of brass requires fire-forming. To say the least I would like to have one. My cat, dubbed the 35KLR, is a shorter version, like a 300 Whisper/ BLK. Easy to form cases- no mag mods to shoot rifle projos & should perform well subsonic & suppressed. Hope to have a shooter done soon. Quoted:
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Just out of curiosity what kind of numbers does the 358 version put out. This is the first time I've heard of it. Mikes cat is a real performer. Turns the 6.8 case into ine bad 35cal spitter! Only down sides are that it might not be the best for subsonic use, the mags need some mild massaging & the forming of brass requires fire-forming. To say the least I would like to have one. My cat, dubbed the 35KLR, is a shorter version, like a 300 Whisper/ BLK. Easy to form cases- no mag mods to shoot rifle projos & should perform well subsonic & suppressed. Hope to have a shooter done soon. Thanks gtfoxy, I will add it to the list |
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Negative. There's nothing wrong with the theory. Rounds like .458 SOCOM and .50 Beowulf show that larger calibers are feasible, despite the pressure limitations.
Therefore, if the 0.42" SPC case permits wildcats from, say .17 caliber up to .36 caliber, and a 0.44" case allows wildcats from .17 caliber to .38 caliber, then the fatter case is more adaptable. Negative. There's nothing wrong with the theory. Rounds like .458 SOCOM and .50 Beowulf show that larger calibers are feasible, despite the pressure limitations.
Therefore, if the 0.42" SPC case permits wildcats from, say .17 caliber up to .36 caliber, and a 0.44" case allows wildcats from .17 caliber to .38 caliber, then the fatter case is more adaptable. I will change is to simply the most wildcatted and adapted parent case in the AR15 family of cases. Happy? Possibly, but I would attribute it to other things, such as the popularity of 6.8 SPC itself, the ability of the SPC case to be necked up to larger calibers than the 5.56 case, and the greater powder capacity of the SPC case relative to the 5.56 case. And that figure of 26 SPC-based wildcats sounds more impressive than it actually is, because some of the listed rounds have negligible differences between them. For instance, 6mm DTI and 6x6.8, or 30 HRT and .30 HRT. Wow, I'm sure those fellows that put their time, money and efforts into their cats based off the 6.8 case would disagree. Now that the number is 27 its even more impressive wouldnt you say. Now stanc, push away from the keyboard, return to your favorite playground. Let us talk about ours in an uninterupted fashion. Thank you |
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I don't recall ever reading about that necked-down .25 Rem round, but I know Ordnance did develop a 6.35x48mm cartridge (derived from the .25 Rem) to fit the AR15 without a complete redesign of the rifle. http://www.ammo-one.com/sitebuilder/images/6-35x48FA59-248x438.jpg Quoted:
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One of the civilian Army Ordnance engineers felt that to meet the SCHV requirements, a new case would have been more appropriate based on the 25 Remington, which was a necked down .30 Remington. They were set on a .224 bore, but he felt case capacity was too limited with the .222 Remington based 5.56x45, and he also wanted to use the 68gr bullets with boat tails to retain energy well for the 500yd steel helmet perforation requirement. That would have required a complete redesign of the rifle around the necked down .25 Rem... I don't recall ever reading about that necked-down .25 Rem round, but I know Ordnance did develop a 6.35x48mm cartridge (derived from the .25 Rem) to fit the AR15 without a complete redesign of the rifle. http://www.ammo-one.com/sitebuilder/images/6-35x48FA59-248x438.jpg Check out the Lindahl Chcuker circa 1940 and the Rimless Nieder Magnum circa 1930's in Wildcat Cartidges. They didn't shorten them up quite as much as we do but the concept is strong. Greg |
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Wow, I'm sure those fellows that put their time, money and efforts into their cats based off the 6.8 case would disagree. Quoted:
...that figure of 26 SPC-based wildcats sounds more impressive than it actually is, because some of the listed rounds have negligible differences between them. For instance, 6mm DTI and 6x6.8, or 30 HRT and .30 HRT. Wow, I'm sure those fellows that put their time, money and efforts into their cats based off the 6.8 case would disagree. So, you're saying there's a significant difference between the 30 HRT and .30 HRT? 
Now that the number is 27 its even more impressive wouldnt you say. I'd say what is this pathological need you have to continually try to prove how wonderful your pet cartridge is? Insecurity issues? 
Now stanc, push away from the keyboard, return to your favorite playground. Okay. Bye. 
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So, you're saying there's a significant difference between the 30 HRT and .30 HRT?
I'd say what is this pathological need you have to continually try to prove how wonderful your pet cartridge is? Insecurity issues?
Okay. Bye. Quoted:
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...that figure of 26 SPC-based wildcats sounds more impressive than it actually is, because some of the listed rounds have negligible differences between them. For instance, 6mm DTI and 6x6.8, or 30 HRT and .30 HRT. Wow, I'm sure those fellows that put their time, money and efforts into their cats based off the 6.8 case would disagree. So, you're saying there's a significant difference between the 30 HRT and .30 HRT?
Now that the number is 27 its even more impressive wouldnt you say. I'd say what is this pathological need you have to continually try to prove how wonderful your pet cartridge is? Insecurity issues?
Now stanc, push away from the keyboard, return to your favorite playground. Okay. Bye. Getting into a debate about the validity of one 6.8 based wildcat or another is not the point of this thread. All cats based on any parent case are valid, no matter how similar or dissimilar. The point of making them is for the enjoyment of those making and using them. I got a better understanding of this watching Mark and his .277 WLV. How well the little 6.8 case has been adapted and all the people enjoying doing so is the point of this thread. As well you have shown you true colors as nothing more that a troll here. Especially with your personal attack This has been reported. I am going to adhere to the forum rules to the letter. So I will not engage in this with you sir. |
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Variants on the 6.8 as a parent case have been around since 2007, these continue to be developed today. The 6.8 case in particular lends itself to being modified into a variant very well. This is a list of variant AR15 rounds built off the 6.8SPC case. .20x6.8 20 PDK (thanks GLShooter) 22x6.8 22 PDK (thanks GLShooter) 22DTI (thanks Yankindachain) 5.56x42 (thanks Yankindachain) 6mm DTI (thanks Yankindachain) 6x41 (thanks Yankindachain) 6 MM PDK (thanks GLShooter) 6x6.8 25 DTI (thanks Yankindachain) .25x6.8 6mm WOA (thanks Yankindachain) 6DTI (thanks Yankindachain) 6PDK (thanks Yankindachain) 6.5 DTI all DTI cartridges have 30 degree sholders (thanks Yankindachain) 6.5 MM PDK (thanks GLShooter) 6.5x6.8 Six5 .30x6.8 American 30 from BHW (thanks GLShooter) 30 HRT by Marty (thanks Yankindachain) .30 HRT (thanks Bowhntr6pt) 30 Herrett - ARPerformance version .338 spectre (thanks DBrown) .358x6.8 35KLR (thanks gtfoxy) In barrel lengths from 7.5 to 24 inches. Once a person gets set up reloading the 6.8 SPCII it opens a whole realm of possible variant calibers you can pursue off one case. With a set of Redding bushing dies and the correct bushing sizes creating brass for the variant you chose is fairly easy. Some variants also use existing dies of like calibers. Black Hole Weaponry , AR Performance and MPG Customs can fix you up with almost anything you need. For any I missed post in the thread and I will add to the list giving you credit, thank you. I sure hope your getting paid for your efforts... |
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Lets get this thread back on track.
If you own and shoot one of the various 6.8SPC based variants could you post a few things about it. Such as kills on game made. Speeds and accuracy attained. If you like it or not, but only if you own or have owned one Etc. I'm sure it would help anyone considering one. It would help me picking my next build. I'm leaning towards a 6mm, 6.5 or .22 on the 6.8 case. But also looking at the .277WLV Right now 6x68 is winning then a WLV after that. |
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I agree Angus6 But as we both know stanc and LRRPF52 posting about the .25 and .30 remington are just trying to derail the point I'm making anyhow. Because neither of those cases pertain to wildcats based off the 6.8SPC, which is what this thread it about. I'm staying out of their threads, they cannot make themselves stay out of mine. They will try to pick everything apart to take focus off what is the truth. The 6.8 SPC case is the single most wildcatted case in the AR15 platform Quoted:
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hey Yama_Raja change it to 6.8 the Most Popular AR15 cartridge Ever to be wildcatted unlike some others , I mean just how many .458 wildcats do you see I agree Angus6 But as we both know stanc and LRRPF52 posting about the .25 and .30 remington are just trying to derail the point I'm making anyhow. Because neither of those cases pertain to wildcats based off the 6.8SPC, which is what this thread it about. I'm staying out of their threads, they cannot make themselves stay out of mine. They will try to pick everything apart to take focus off what is the truth. The 6.8 SPC case is the single most wildcatted case in the AR15 platform I was actually validating the thread and providing some historical background about the .30 Remington as a cartridge that had been looked at in the late 1950's when trying to find a better solution than the .222 Remington cartridge. The 6.8 SPC is a .30 Remington-based cartridge. This is a technical forum where technical discussions are inclusive of relevant topics. I'm sorry that you see my post as an attempt to derail the thread, especially considering that it cuts to the core of the conversation by providing background significance for the history of wildcatting .30 Remington to fit in the AR15, something most people are probably unaware of. It is also interesting that there were Small Caliber High Velocity wildcats being focused on based on the .30 Remington parent case, exactly like most of those mentioned in the thread. If that's derailing then I'm not sure what exactly you are trying to accomplish with the thread, as my post only supported the validity of wildcatting the .30 Remington in the AR15. If the AR15 had been engineered around the .30 Remington parent case, it would have left us all with a bit more open architecture to develop the platform further in the modern era, as the barrel extension, barrel tennon ,and bolt would have all been engineered around a FOS of 2 like they did with .222 Remington in the AR15. |
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I agree Angus6 But as we both know stanc and LRRPF52 posting about the .25 and .30 remington are just trying to derail the point I'm making anyhow. Quoted:
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hey Yama_Raja change it to 6.8 the Most Popular AR15 cartridge Ever to be wildcatted unlike some others , I mean just how many .458 wildcats do you see I agree Angus6 But as we both know stanc and LRRPF52 posting about the .25 and .30 remington are just trying to derail the point I'm making anyhow. You may think you know that, but as usual you're wrong. I was only elaborating on LRRPF52's post. I had no intent to derail the thread. Because neither of those cases pertain to wildcats based off the 6.8SPC, which is what this thread it about. Yes, I plead guilty to making an off-topic post. Have you never done so? I'm staying out of their threads, they cannot make themselves stay out of mine. a. I have no threads here, so that part of your comment is illogical. b. If your threads are not open to public discussion, you should note that in the OP. |
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Lets get this thread back on track. If you own and shoot one of the various 6.8SPC based variants could you post a few things about it. Such as kills on game made. Speeds and accuracy attained. If you like it or not, but only if you own or have owned one Etc. I'm sure it would help anyone considering one. It would help me picking my next build. I'm leaning towards a 6mm, 6.5 or .22 on the 6.8 case. But also looking at the .277WLV Right now 6x68 is winning then a WLV after that. If your not in a hurry Bruce's .257 Bobcat might be worth waiting to see how it works out I was wishing he had gone with the 6mms instead of the 1/4 bore just because I have a nice stock pile of 6mms for the 6x68 and 6x45 
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I was actually validating the thread and providing some historical background about the .30 Remington as a cartridge that had been looked at in the late 1950's when trying to find a better solution than the .222 Remington cartridge. The 6.8 SPC is a .30 Remington-based cartridge. This is a technical forum where technical discussions are inclusive of relevant topics. I'm sorry that you see my post as an attempt to derail the thread, especially considering that it cuts to the core of the conversation by providing background significance for the history of wildcatting .30 Remington to fit in the AR15, something most people are probably unaware of. It is also interesting that there were Small Caliber High Velocity wildcats being focused on based on the .30 Remington parent case, exactly like most of those mentioned in the thread. If that's derailing then I'm not sure what exactly you are trying to accomplish with the thread, as my post only supported the validity of wildcatting the .30 Remington in the AR15. If the AR15 had been engineered around the .30 Remington parent case, it would have left us all with a bit more open architecture to develop the platform further in the modern era, as the barrel extension, barrel tennon ,and bolt would have all been engineered around a FOS of 2 like they did with .222 Remington in the AR15. Quoted:
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hey Yama_Raja change it to 6.8 the Most Popular AR15 cartridge Ever to be wildcatted unlike some others , I mean just how many .458 wildcats do you see I agree Angus6 But as we both know stanc and LRRPF52 posting about the .25 and .30 remington are just trying to derail the point I'm making anyhow. Because neither of those cases pertain to wildcats based off the 6.8SPC, which is what this thread it about. I'm staying out of their threads, they cannot make themselves stay out of mine. They will try to pick everything apart to take focus off what is the truth. The 6.8 SPC case is the single most wildcatted case in the AR15 platform I was actually validating the thread and providing some historical background about the .30 Remington as a cartridge that had been looked at in the late 1950's when trying to find a better solution than the .222 Remington cartridge. The 6.8 SPC is a .30 Remington-based cartridge. This is a technical forum where technical discussions are inclusive of relevant topics. I'm sorry that you see my post as an attempt to derail the thread, especially considering that it cuts to the core of the conversation by providing background significance for the history of wildcatting .30 Remington to fit in the AR15, something most people are probably unaware of. It is also interesting that there were Small Caliber High Velocity wildcats being focused on based on the .30 Remington parent case, exactly like most of those mentioned in the thread. If that's derailing then I'm not sure what exactly you are trying to accomplish with the thread, as my post only supported the validity of wildcatting the .30 Remington in the AR15. If the AR15 had been engineered around the .30 Remington parent case, it would have left us all with a bit more open architecture to develop the platform further in the modern era, as the barrel extension, barrel tennon ,and bolt would have all been engineered around a FOS of 2 like they did with .222 Remington in the AR15. Yes, I see that now. Please accept my apology and thank you for your input sir. |
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What is your favorite out of all the BHW 6.8 variants Greg? Quoted:
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IIRC there is factory ammo available for the 6x68 Tactical Ammuntion sells loaded 6X6.8 Greg What is your favorite out of all the BHW 6.8 variants Greg? It would have to be the 6X6.8. It will do anything from PD's to deer. It is a bit light for elk but you know it would do in pinch. Greg |
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Yama_Raja
You should reply to the Federal Cartridge ammo thread on the 68forums with this information. Sounded like Federal was wanting to ramp up 6.8 ammo production, but only issue is it's not a standard case. This thread could really show Federal the popularity of the 6.8 SPC case size. Eventually it could have all the variants like the .308 based cases. |
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I built myself a 30cal 6.8. I used a 6.8 reamer for the body. A 30 carbine reamer to cut the neck & a 30cal throater to finish it up. All I did to the case is neck it up & trim to 1.6". When complete the case mouth crimps into the last crimp groove pefectly a 2.295" with the 110g Barnes Tac-X
Used a Mcgowan 12 twist SS blank. I moded a 6.8 sizer & use the 30Herritt seater die. Bigest issue is getting enough powder in there to get pressures up. After some testing I settled on A1680. A Barnes 110g Tac-X will hit 2700fps from my 12.5" brl. 16' will net 2800fps & a 20" will do 2900fps with my QL calculations. My extreme spread is 11fps. . |
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I enjoy constructor's 5.56x41 wildcat. I believe his point in introducing it was to take advantage of Hornady's 75 AMAX bullet, which is out of production sadly. Ive been meaning to try out some JLKs or Berger 80/82s in it but havent had the time as I have concentrated on 5.45x39 this year. ETA: I am not even sure they would work with the longer ogive.
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I built myself a 30cal 6.8. I used a 6.8 reamer for the body. A 30 carbine reamer to cut the neck & a 30cal throater to finish it up. All I did to the case is neck it up & trim to 1.6". When complete the case mouth crimps into the last crimp groove pefectly a 2.295" with the 110g Barnes Tac-X Used a Mcgowan 12 twist SS blank. I moded a 6.8 sizer & use the 30Herritt seater die. Bigest issue is getting enough powder in there to get pressures up. After some testing I settled on A1680. A Barnes 110g Tac-X will hit 2700fps from my 12.5" brl. 16' will net 2800fps & a 20" will do 2900fps with my QL calculations. My extreme spread is 11fps. . Have you tried heavies and suppression yet , because that sounds killer. Essentially, you'd have about 400 - 500fps over the BLK supersonic with identical barrel length. Then you'd have identical sub performance, maybe better since you may be able to push a heavier bullet. Of course feeding / bullet length / mag seating etc come into play. |
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I enjoy constructor's 5.56x41 wildcat. I believe his point in introducing it was to take advantage of Hornady's 75 AMAX bullet, which is out of production sadly. Ive been meaning to try out some JLKs or Berger 80/82s in it but havent had the time as I have concentrated on 5.45x39 this year. ETA: I am not even sure they would work with the longer ogive. Midsouth Shooters has some 75 Amax |
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Yama_Raja,
I am not sure what the point of your/this post is. If you were/are looking for advice on a 6.8 SPC based wildcat, which you do not state until somewhere on page two, you should be more direct. Instead, your first post reads like an advertisement for three companies. Quoted:
Black Hole Weaponry , AR Performance and MPG Customs can fix you up with almost anything you need. I have to agree with stanc that the content and subject of your post(s) about the 6.8 SPC seem pathological, suggesting a constant need for validation on your choice of going with the 6.8 SPC. The 6.8 SPC is a great caliber in the AR platform and it's popularity is well known. However, there are other calibers that also perform their intended function quite admirably. Just to give readers another perspective the contemporary concept of Small Caliber High Velocity (SCHV) is an idea that goes back to the 1950's. However, the idea of a SCHV cartridge goes back even further. Think of the 6mm Lee circa 1895 and the 250-3000 Savage circa 1915. Eugene Stoner's early version of the Ar-15 were based on the 222 Rem. In Seeking higher velocities, the case was extended and the shoulder moved forward varying amounts. Ultimately the case was extend 0.060" and the shoulder moved forward to become the 223 Rem. The rest is history. The 222 Rem has spawned several wildcats and commercial calibers. I have come up with about 37 different 222 Rem cartridges. I know that I have left a few off the list below. So it looks like the little diminutive 222 Rem case has been well received and has provided al lot of people with shooting and wildcatting enjoyment, as has the 6.8 SPC. 222 Rem derived cartridges 17 Fireball* 17 Rem* 17-223 REM 204 Ruger* 20 Tactical 20-222 20 Practical 223 Rem* 223 Ackley^ 222 Rem Mag* 221 Fireball* 6mmm x 45^ 6mm TCU^ 6mmm x 47 6mm Whisper^ 257 TCU 257 Kimber 25-222 (25-222 Coperhead) .25 x 47 25x40 25-223Ar 25x45 Sharps* 256 Win Mag Rimless 6.5 TCU^ 6.5mm Whisper^ 6.5 MPC^ 6.5 PCC 6.8x45mm Kramer UCC 277 Wolverine 270-223 Ingram 7mm Whisper^ 7mm TCU^ 7mm-223 Ingram 300 Blackout* ---300 Whisper^ ---300-221 Fireball 30 Apache ---30-223 7.65x40WT^ 338 Whisper * commercial cartridge # semi-commercial or third party supported/ popular wildcat --- similar cartridge different name |
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My point is to show people how much adaptability the 6.8 has.
Your personal attack is unwarranted. I have gotten quite a few compliments on this thread actually. Perhaps in the interest of fairness you should call everyone on this board that has a favorite cartridge pathological. This variant part of the board has been so biased to a certain caliber for so long that I find it quite funny that proponents of that caliber take offense to anything concerning the 6.8. The topic of this post is the 6.8 in an AR15 platform. Since many of the calibers in your list are not AR15 caliber cartridges I find that yet again a proponent of a different caliber is trying to disrupt this thread. Please desist Quoted:
Yama_Raja, I am not sure what the point of your/this post is. If you were/are looking for advice on a 6.8 SPC based wildcat, which you do not state until somewhere on page two, you should be more direct. Instead, your first post reads like an advertisement for three companies. I have to agree with stanc that the content and subject of your post(s) about the 6.8 SPC seem pathological, suggesting a constant need for validation on your choice of going with the 6.8 SPC. The 6.8 SPC is a great caliber in the AR platform and it's popularity is well known. However, there are other calibers that also perform their intended function quite admirably. |
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I seem to recall a few different people here posting similar topics about all the cats made from the Grendel or 223 and all of the place to buy Grendel or Blackout ammo. Why do the same people that post those topics get bent out of shape when someone post 6.8 topics in the same way? We could all go back to 2008 and have some caliber wars in typical arfcom fashion with everyone jumping into threads they have no business in talking about things they know nothing about.
People are curious and some would like another caliber bullet in a certain case but don't know where to find it. This thread may point some it the right direction. There are more 25 cal hunting fanatics all the time and seems to be a move toward the 6mm for tactical comps since the lighter weight higher BC bullets can be driven faster. |
[ARCHIVED THREAD] - 6.8 case based AR-15 Variants. (Page 1 of 2)
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