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User Panel
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OR, USA
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Posted: 5/3/2013 6:11:07 AM EDT
[#1]
I was finishing my assignment at Ft. Knox Army base. It involved shooting 5.56 blanks. That got me to wondering if I could use the blank cases to make my 7.62x40 cases. There is plenty of room to trim, the cases are all Lake City and a good cleaning would take care of the dirty powder they use. Super cheap and can often be bought for scrap prices.
Bill in OR |
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WI, USA
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Posted: 5/3/2013 6:52:09 AM EDT
[#2]
I'm not sure about LC blanks but others are often made of reject brass with improper work hardening. Leaving them unsafe for real cartridge pressures.
Adfntrjnky |
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Posted: 5/4/2013 2:42:52 PM EDT
[#3]
It's official.....bout two hours ago became a Grandpa, a new shooter is born...
My puppies: 
The new Grand-pup
Mom and baby are doing great.....bugged out of the room for a little while to let everybody get a nap....been in the works since 4AM.... A custom CZ 452 Scout already in the works.....sporting the 3/4" Redfield my dad gave me when I was about 6 
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NC, USA
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Posted: 5/4/2013 6:24:35 PM EDT
[#4]
Congratulations !
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OR, USA
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Posted: 5/4/2013 8:47:32 PM EDT
[#5]
Very cool! Congrat's
Bill in OR |
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WA, USA
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Posted: 5/5/2013 12:31:30 AM EDT
[Last Edit: snwbrdrcr]
[#6]
Upper sold.
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USA
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Posted: 5/5/2013 2:49:04 PM EDT
[#7]
God bless and Congrats...Sorry you have to miss out on the X40 WT...Putting one together this week...
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MN, USA
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Posted: 5/8/2013 4:28:46 PM EDT
[#8]
Just had an issue while finishing my upper. I got everything together and go to slide the bolt in my upper and it was a no go, gas tube about 2" too long. I am starting to think that my new barrel is not mid-length as described on Wilson's site. I am getting a measurement of ~7.25" from my upper to the start of the gas block, would that not make it carbine gas? I have not been able to sit on hold to talk with Wilson about this. I have the 16" lightweight that I ordered on 3/14 when they came back in stock. Has anyone else ran into this issue?
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Posted: 5/8/2013 4:32:15 PM EDT
[#9]
sounds like carbine gas to me and if i had a 16 i would want the carbine gas over the mid any day it gives you more powder choices.
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MN, USA
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Posted: 5/8/2013 4:38:38 PM EDT
[#10]
I am happy with the carbine as I have lots of powder for it. I just find it strange they changed the specs with no notice. Now off to order a new tube.
Originally Posted By BIGGDAWG:
sounds like carbine gas to me and if i had a 16 i would want the carbine gas over the mid any day it gives you more powder choices. |
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UT, USA
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Posted: 5/9/2013 2:06:19 PM EDT
[#11]
Originally Posted By upnorth26:
Just had an issue while finishing my upper. I got everything together and go to slide the bolt in my upper and it was a no go, gas tube about 2" too long. I am starting to think that my new barrel is not mid-length as described on Wilson's site. I am getting a measurement of ~7.25" from my upper to the start of the gas block, would that not make it carbine gas? I have not been able to sit on hold to talk with Wilson about this. I have the 16" lightweight that I ordered on 3/14 when they came back in stock. Has anyone else ran into this issue? Yes, Just recieved the same barrel couple days ago. And noticed when i took it out of the box it looked like carbine gas and measured out as so. Good thing i have not ordered a gas tube yet. |
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USA
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Posted: 5/9/2013 2:53:49 PM EDT
[#12]
Wrote to them asking for any updated load Info for the 20" Mid Gas x40...or
a list of powders that will work for the longer barrel lengths... Yeah, if its 7.125" from the end of upper to the gas block journal it is a Carbine length gas system. |
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WA, USA
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Posted: 5/14/2013 3:15:46 PM EDT
[#13]
Buyer failed to come thru with the funds, so my 7.62x40wt upper, reloading supplies / equipment and magazines are back on the market.
 Again I apologize for posting on this thread, but the general public on the EE tends not to understand this cartridge.
7.62x40wt Upper + Extras |
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CA, USA
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Posted: 5/20/2013 12:58:41 AM EDT
[Last Edit: bigfrank]
[#14]
If you want to crimp, just have Lee make you a factory crimp die for the x40. They made me one and it works great.
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FL, USA
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Posted: 6/1/2013 4:21:14 PM EDT
[Last Edit: Jourdan_D]
[#15]
Anyone ever loaded any of these?
http://www.midwayusa.com/product/539640/hornady-bullets-30-caliber-308-diameter-110-grain-spire-point-box-of-100 They are the hornady 110gr spire I've got loads for the hornady 110gr vmax but not these soft points. Figured $5 cheaper per 100 will make my plunking loads cost less. |
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Posted: 6/1/2013 6:44:11 PM EDT
[Last Edit: BIGGDAWG]
[#16]
Originally Posted By Jourdan_D:
Anyone ever loaded any of these? http://www.midwayusa.com/product/539640/hornady-bullets-30-caliber-308-diameter-110-grain-spire-point-box-of-100 They are the hornady 110gr spire I've got loads for the hornady 110gr vmax but not these soft points. Figured $5 cheaper per 100 will make my plunking loads cost less. yes i have and they shoot great, they shoot even better than the vmax, i use the same loads for both of them. I load the sp to 2.15-2.18 and the vmax to 2.25 left is vmax at 200 and right is sp at 200 in the 2550 fps range 
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FL, USA
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Posted: 6/2/2013 12:44:35 PM EDT
[#17]
Thanks for the info. Looking forward to trying this bullet. I've always had good accuracy with the vmax just looking for a cheaper bullet to plink with
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NY, USA
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Posted: 6/2/2013 1:14:52 PM EDT
[#18]
I have a friend who has a 762x40WT and he tried some of the Hornady 100gr short jacket varmint rounds I had bought wanting to try in the blackout(accuracy sucked big balls), but in his rifle they make awesome cheap plinkers and very accurate with medium loads, I got them for 12$ per100.
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Posted: 6/2/2013 4:03:57 PM EDT
[#19]
Originally Posted By talonxracer:
I have a friend who has a 762x40WT and he tried some of the Hornady 100gr short jacket varmint rounds I had bought wanting to try in the blackout(accuracy sucked big balls), but in his rifle they make awesome cheap plinkers and very accurate with medium loads, I got them for 12$ per100. I found some of the lighter M-1 carbine bullets recently at a decent price that work pretty well for an inexpensive plinker...they're kinda loaded length sensitive due to the blunt ogive, but they work out pretty well.... |
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OR, USA
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Posted: 6/11/2013 12:14:12 PM EDT
[#20]
Is anyone shooting cast bullets w/ gas checks in their 7.62x40? How about plated bullets? I have quite a few of 122 gr. cast and 500 150 gr. Berry plated bullets with a flat nose. The flat nose may cause some feeding issues but if not at least I'll have a cheap supply of plinkers. I also just found a nice supply of 100gr. 30 carbine FMJ bullets and two boxes of the 100 gr. plinkers by Sierra (I think it is Sierra). With all the 125 Nosler BT's and 110 gr. Speers I have I should be set for a while.
My upper is all together but Wilson is out of stock for a set of dies. I checked with CH4 and they are also out of stock but will custom make a set...but the delivery time is WAYYYYY out there. Anyone have a lead on a set of dies? I know that a few people have re-chambered these so maybe there is a set of orphaned dies out there? Thanks, Bill in OR |
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OR, USA
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Posted: 6/11/2013 10:39:14 PM EDT
[#21]
Accurate 5744 in the 7.62x40?? I found quite a few loads for the 300 Blackout using 5744 at the higher velocities here: http://www.accuratepowder.com/wp-content/uploads/2010/09/300_ACC_Blackout_Data.pdf
The burn rate: Back by popular demand! Accurate has re introduced 5744. 5744 Is a short cut, extruded, double base rifle propellant. Its burn rate is between our No. 9 and 1680. Has anyone tried it in the 7.62x40? I'm completely unable to locate 1680 locally. Bill in OR |
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Posted: 6/11/2013 11:33:27 PM EDT
[Last Edit: BIGGDAWG]
[#22]
Originally Posted By huntkng:
Accurate 5744 in the 7.62x40?? I found quite a few loads for the 300 Blackout using 5744 at the higher velocities here: http://www.accuratepowder.com/wp-content/uploads/2010/09/300_ACC_Blackout_Data.pdf The burn rate: Back by popular demand! Accurate has re introduced 5744. 5744 Is a short cut, extruded, double base rifle propellant. Its burn rate is between our No. 9 and 1680. Has anyone tried it in the 7.62x40? I'm completely unable to locate 1680 locally. Bill in OR haven't tried it but i ran it through quickload and it looks workable to me. I think i will look for a lb to try. my mid gas 18 is picky on powder to cycle the action. 1680 is all that works reliably, 110 gives great velocity and accuracy but no cycling. if you try it before me report back with results. here is quick load data for an 18" and the 110 hornady sp use at own risk start 10% below max of 23.9 Cartridge : 7.62 x 40 WT and here is the 125 sierra pro hunter loaded to 2.2 oal Cartridge : 7.62 x 40 WT |
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Posted: 6/12/2013 8:00:54 AM EDT
[#23]
Originally Posted By huntkng:
Accurate 5744 in the 7.62x40?? I found quite a few loads for the 300 Blackout using 5744 at the higher velocities here: http://www.accuratepowder.com/wp-content/uploads/2010/09/300_ACC_Blackout_Data.pdf The burn rate: Back by popular demand! Accurate has re introduced 5744. 5744 Is a short cut, extruded, double base rifle propellant. Its burn rate is between our No. 9 and 1680. Has anyone tried it in the 7.62x40? I'm completely unable to locate 1680 locally. Bill in OR It's pretty bulky but will work for most of the flat base 110 & 125 loads.... Very consistent powder...low standard deviations in the loads I tried.... Your rifle may not cycle with it depending on how it's ported.... |
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OR, USA
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Posted: 6/12/2013 10:45:45 AM EDT
[#24]
I think that with the current lack of powder selections we are all trying powders that sit on the edges of what we are use to.
Here are some loads using 4227. NONE of these are my loads and I have NOT tested them so proceed at your own risk. As soon as I locate a set of dies I'll be doing a lot of load development and I will share then. My upper is an Aero with an 18" 7.62x39 barrel from Wilson. I HAVE NOT TESTED THE BELOW DATA. Proceed with caustion and reduce accordingly. 7.62x40mm 16" 1:8 Olmypic .078 gas port carbine length gas system, fire-formed brass... 125 TNT 21.5gr H4227 = 2,230 fps 125 TNT 22.0gr H4227 = 2,350 fps 125 TNT 22.5gr H4227 = 2,440 fps 125 TNT 25.8gr 1680 = 2,430 fps 125 TNT 22gr lil-gun = 2,540 fps 125 TNT 22gr H110 = 2,480 fps 125 TNT 22gr W296 = 2,475 fps 135 SMK 19gr W296 = 2,211 fps 135 SMK 19.5gr W296 = 2,270 fps 135 SMK 20gr W296 = 2,310 fps 135 SMK 20.5gr W296 = 2,350 fps 155 SMK 17gr H4227 = 1,915 fps 155 SMK 17.5gr H4227 = 1,970 fps 155 SMK 18gr H4227 = 2,010 fps 155 SMK 18.5gr H4227 = 2,050 fps 155 SMK 18.8gr H4227 = 2,072 fps 155 SMK 19gr H4227 = 2,095 fps His listed favorite loads are the: 125 TNT 22.5gr H4227 = 2,440 fps 135 SMK 20.5gr W296 = 2,350 fps.....going to try the 135's with the 4227 this weekend. 155 SMK 19gr H4227 = 2,095 fps.... 320 Major Power Factor with a 16" barrel.....WoooooooHoooooo 7.62x40mm 16" 1:8 Olmypic .078 gas port carbine length gas system, fire-formed brass... 135 SMK 19gr H4227 = 2,149 fps 135 SMK 19.5gr H4227 = 2,190 fps 135 SMK 20gr H4227 = 2,240 fps 135 SMK 20.5gr H4227 = 2,278 fps 135 SMK 21gr H4227 = 2,312 fps 135 SMK 21.5gr H4227 = 2,330 fps 135 SMK 22gr H4227 = 2,361 fps Bill in OR |
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USA
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Posted: 6/12/2013 11:12:20 AM EDT
[#25]
Anyone have load data using RE-7 powder with the mid-length gas system (18" or 20" Bbl. length) ? Thanks.
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Posted: 6/12/2013 11:22:24 AM EDT
[#26]
Originally Posted By Dr69er:
Anyone have load data using RE-7 powder with the mid-length gas system (18" or 20" Bbl. length) ? Thanks. I ran numbers last night vic and i don't think it will work real well, the case will get full. i will post up some ql data on the noon hour for ya but use at own risk as everyone says. |
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Posted: 6/12/2013 11:41:41 AM EDT
[#27]
Originally Posted By huntkng:
I think that with the current lack of powder selections we are all trying powders that sit on the edges of what we are use to. Here are some loads using 4227. NONE of these are my loads and I have NOT tested them so proceed at your own risk. As soon as I locate a set of dies I'll be doing a lot of load development and I will share then. My upper is an Aero with an 18" 7.62x39 barrel from Wilson. I HAVE NOT TESTED THE BELOW DATA. Proceed with caustion and reduce accordingly. 7.62x40mm 16" 1:8 Olmypic .078 gas port carbine length gas system, fire-formed brass... 125 TNT 21.5gr H4227 = 2,230 fps 125 TNT 22.0gr H4227 = 2,350 fps 125 TNT 22.5gr H4227 = 2,440 fps 125 TNT 25.8gr 1680 = 2,430 fps 125 TNT 22gr lil-gun = 2,540 fps 125 TNT 22gr H110 = 2,480 fps 125 TNT 22gr W296 = 2,475 fps 135 SMK 19gr W296 = 2,211 fps 135 SMK 19.5gr W296 = 2,270 fps 135 SMK 20gr W296 = 2,310 fps 135 SMK 20.5gr W296 = 2,350 fps 155 SMK 17gr H4227 = 1,915 fps 155 SMK 17.5gr H4227 = 1,970 fps 155 SMK 18gr H4227 = 2,010 fps 155 SMK 18.5gr H4227 = 2,050 fps 155 SMK 18.8gr H4227 = 2,072 fps 155 SMK 19gr H4227 = 2,095 fps His listed favorite loads are the: 125 TNT 22.5gr H4227 = 2,440 fps 135 SMK 20.5gr W296 = 2,350 fps.....going to try the 135's with the 4227 this weekend. 155 SMK 19gr H4227 = 2,095 fps.... 320 Major Power Factor with a 16" barrel.....WoooooooHoooooo 7.62x40mm 16" 1:8 Olmypic .078 gas port carbine length gas system, fire-formed brass... 135 SMK 19gr H4227 = 2,149 fps 135 SMK 19.5gr H4227 = 2,190 fps 135 SMK 20gr H4227 = 2,240 fps 135 SMK 20.5gr H4227 = 2,278 fps 135 SMK 21gr H4227 = 2,312 fps 135 SMK 21.5gr H4227 = 2,330 fps 135 SMK 22gr H4227 = 2,361 fps Bill in OR That load data looks..........familiar........lol lol 
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Posted: 6/12/2013 12:39:46 PM EDT
[#28]
Vic,
here is the re7 data for 110 hornady sp use and own risk Cartridge : 7.62 x 40 WT and the 125 sierra pro hunter Cartridge : 7.62 x 40 WT |
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Posted: 6/12/2013 12:42:17 PM EDT
[#29]
It's probably worth pointing out that the above 4227 loads are with "H" 4227 and not IMR 4227.... Testing that myself and others have done with the current IMR 4227 shows that it is significantly faster than the discontinued H4227.... Brass that would walk away from stiff H4227 loads, is ruined by the same load in IMR 4227.... just an fyi...... |
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OR, USA
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Posted: 6/12/2013 1:19:49 PM EDT
[#30]
Good points, no, great points actually. For me. I'm just looking for reliability and repeatability. My 7.62x40 will be a hunting gun and I have never seen an animal that was properly hit that knew the difference in 100fps + -. I guess what I'm saying is that this gun will never be a .308...but I know there are those out there that will try and push the envelope, even at the expense of some personal safety.
Thanks for the heads up, Bill in OR |
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Posted: 6/12/2013 2:05:54 PM EDT
[Last Edit: 762x40mm]
[#31]
Originally Posted By huntkng:
Good points, no, great points actually. For me. I'm just looking for reliability and repeatability. My 7.62x40 will be a hunting gun and I have never seen an animal that was properly hit that knew the difference in 100fps + -. I guess what I'm saying is that this gun will never be a .308...but I know there are those out there that will try and push the envelope, even at the expense of some personal safety. Thanks for the heads up, Bill in OR A friend and I have had several conversations and compiled a good bit of info on animals taken off his ranch in Texas and several other places we've hunted.....everything from 20 pound pigs to 225 lb Axis deer.....taken with everything from 223 to 300 Win Mag, including lots of wildcats like the 300 Blackout and 7.62x40mm..... we're pretty fortunate that most of the shots that we have to take are inside of 200 yds.....we're actually seeing there is more trauma on something like deer with purpose picked load/velocity/bullet/range combinations in smaller wildcats like the 300 Blackout or 7.62x40mm, that expend all of their energy on target rather than the like the guy that shows up with an off the shelf 308 or 30-06 shooting 150 or 180grainers... We've seen it over and over where nearly identical shots (animal size, range, shot placement) where the 150 or 180s punch through doing little internal injury and expending most of their energy in the dirt behind the animal...versus the velocity and bullet matched 110s that expend almost all of their energy on target and produce way more internal injury.... So when people ask us what to hunt with at the ranch...we jokingly say: 'how bad do you want to be beat up, and how dead and blown up do you want it' |
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OR, USA
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Posted: 6/12/2013 4:14:48 PM EDT
[#32]
I've found the same thing. I've been hunting with handguns, mostly single shots, for the last 30 years or so. The velocity out of a 30 Herrett is very close to the 7.62x40 and it has taken quite a few animals for me using the 125 Nosler BT. My other hunting handguns, again not high velocity (2400 - 2500FPS w/ 150 Noslers) have taken Antelope in WY at a lasered 309 and 318 yards, both one shot kills (and another 30 animals or so). That is what excited me about the 7.62x40. It was a tossup between the 7.62x39 and the 7,62x40 for me. Either would do the job but I like something different and the 7.62x40 won out. Shots in Western Oregon tend to run under 200 yards, just the ticket for the 7.62x40. I've had to pass on shots with the pistol because the animal is in view for such a short time as it moves through the dense foliage. I'm hoping that this little AR will get me on target faster.
I'll also use it in my 3-gun competitions just to have something different. Long shots at our range tend to be in the 150 yard range for 3-gun matches. If I can get her to digest cast and some of my surplus 147 FMJ mil stuff I'll be able to get my practice out there and be ready for fall. Bill in OR |
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Posted: 6/12/2013 4:57:25 PM EDT
[Last Edit: 762x40mm]
[#33]
Originally Posted By huntkng:
....... If I can get her to digest cast and some of my surplus 147 FMJ mil stuff I'll be able to get my practice out there and be ready for fall. Bill in OR A little info on cast, plated, and the mil surplus M-80 147s... cast & plated....you're usually limited by velocity before detrimental things start happening....excessive leading/fouling much over 2,200fps....the trick is to find the weight bullet for your barrel length that will make up energy, if knocking over plates, for the velocity loss and not lead....feeding hasn't been much of a problem as long as shavings and debris can be accepted and just expect to clean the action more...in smaller cartridges that things happen pretty quick in the bullet is usually subjected to more obturation than a slower progression cartridge and can experience more buildup of lead in the transition area between the casemouth and lead/freebore of the chamber....stack a few rounds on top of an obstruction at the entry of the lands and problems can happen quick....not saying it can't be done, just an fyi of what we've seen....and the powder puff loads won't usually run without re-porting the barrel, then you're back down to 300 blackout velocities.... 145/147gr M-80 bullets: some have a more steep ogive and will measure less than 308 at the casemouth when loaded to mag length...it's just a trial and error thing from brand to brand and which mags you use....I had around 6,000 prvi M-80s and it was hit or miss from bag to bag which ogive they were gonna have.... |
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OR, USA
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Posted: 6/12/2013 6:16:38 PM EDT
[#34]
Good info. I have several 1000 147's. I cut the necks off some LC 5.56 last night to get a feel for the case and mag. My OAL is good (2.255 I think) and it looks like I'll have plenty of crimping surface. The cast bullets are 122's and have a gas check. It will / may be a chore to use them with proper cycling. They are hard cast, but who knows if they will hang up. The ramp is the M-4 type and I can open that up a little if I have to.
Thanks for all the advice...now I just need my dies. Mt scope and mount came today in the big brown truck. Bill in OR |
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Posted: 6/12/2013 6:22:37 PM EDT
[#35]
Originally Posted By Dr69er:
Anyone have load data using RE-7 powder with the mid-length gas system (18" or 20" Bbl. length) ? Thanks. I haven't tried it but I have some from testing with my .25-223. Is there a load in particular you are interested in? My 7.62x40 is torn apart right now but I plan to have it back together in a week or two. |
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USA
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Posted: 6/12/2013 7:11:07 PM EDT
[#36]
Originally Posted By Altair:
Originally Posted By Dr69er:
Anyone have load data using RE-7 powder with the mid-length gas system (18" or 20" Bbl. length) ? Thanks. I haven't tried it but I have some from testing with my .25-223. Is there a load in particular you are interested in? My 7.62x40 is torn apart right now but I plan to have it back together in a week or two. 125gr. NBT & 140gr. BTHP/OTM (they are nice and short w/ good BC). |
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Posted: 6/12/2013 7:13:26 PM EDT
[#37]
Originally Posted By Dr69er:
Originally Posted By Altair:
Originally Posted By Dr69er:
Anyone have load data using RE-7 powder with the mid-length gas system (18" or 20" Bbl. length) ? Thanks. I haven't tried it but I have some from testing with my .25-223. Is there a load in particular you are interested in? My 7.62x40 is torn apart right now but I plan to have it back together in a week or two. 125gr. NBT & 140gr. BTHP/OTM (they are nice and short w/ good BC). I have the 125gr NBT but not the 140gr OTM. If I have time I'll load a few of the 125's up and see if they perform as predicted. |
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USA
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Posted: 6/12/2013 9:10:22 PM EDT
[#38]
Originally Posted By Altair:
Originally Posted By Dr69er:
Originally Posted By Altair:
Originally Posted By Dr69er:
Anyone have load data using RE-7 powder with the mid-length gas system (18" or 20" Bbl. length) ? Thanks. I haven't tried it but I have some from testing with my .25-223. Is there a load in particular you are interested in? My 7.62x40 is torn apart right now but I plan to have it back together in a week or two. 125gr. NBT & 140gr. BTHP/OTM (they are nice and short w/ good BC). I have the 125gr NBT but not the 140gr OTM. If I have time I'll load a few of the 125's up and see if they perform as predicted. Thanks. |
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NY, USA
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Posted: 6/14/2013 10:31:03 PM EDT
[#39]
Has anyone heard anything from Wilson regarding when dies will be available? Or know anyone with a set for sale?
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OR, USA
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Posted: 6/15/2013 4:58:08 PM EDT
[#40]
I'm in the same boat. I finished putting together the upper about 10 days ago....now I can't find a set of dies anywhere. All dressed up and no where to go!!
Bill in OR |
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Posted: 6/17/2013 1:49:37 PM EDT
[#41]
Originally Posted By talonxracer:
Has anyone heard anything from Wilson regarding when dies will be available? Or know anyone with a set for sale? I emailed wilson today and got this response Nick Neil (Wilson Combat Support) Jun 17 12:40 (CDT) We are only a few weeks away from another delivery of the dies. You are more tha nwelcome to go ahead and place the dies on backorder. Thank you, Nicholas Neil 1-800-955-4856 Ext: 107 Wilson Combat 2234 CR 719 Berryville, AR 72616 www.wilsoncombat.com |
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NY, USA
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Posted: 6/17/2013 2:40:15 PM EDT
[#42]
Cool good to hear!
Does anyone have a chamber reamer or know of a smith with one, purchase or rent? |
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Posted: 6/17/2013 2:41:39 PM EDT
[#43]
Originally Posted By talonxracer:
Cool good to hear! Does anyone have a chamber reamer or know of a smith with one, purchase or rent? I don't know of anyone that has one but i know ptg sells them, they were in stock the last time i checked. |
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NY, USA
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Posted: 6/17/2013 3:39:23 PM EDT
[#44]
Yeah, I want to rechamber my 13.5" Encore to 762x40WT, I am primarily shooting supersonic 300blk's from the Encore and I am not happy with the extremes I have to go to get the accuracy that I desire with the 110 grain bullets, there is so little amount of the bullets shank in the neck, .012" when seating to .050" off the lands in many cases, that carrying around ammo in your pocket can force the bullet to lean to one side and even disturb the seating depth. I need the dies in hand before I start any rechambering though.....
The added umph of the larger capacity case is a great bonus! LOL |
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Posted: 6/17/2013 5:03:52 PM EDT
[Last Edit: 762x40mm]
[#45]
Originally Posted By talonxracer:
Yeah, I want to rechamber my 13.5" Encore to 762x40WT, I am primarily shooting supersonic 300blk's from the Encore and I am not happy with the extremes I have to go to get the accuracy that I desire with the 110 grain bullets, there is so little amount of the bullets shank in the neck, .012" when seating to .050" off the lands in many cases, that carrying around ammo in your pocket can force the bullet to lean to one side and even disturb the seating depth. I need the dies in hand before I start any rechambering though..... The added umph of the larger capacity case is a great bonus! LOL Just a cautionary on rechambering from: 300-221, 300 Fireball, 300 Whisper, 300 Blackout to 7.62x40..... The "300" chambers have been seen to be as much as 0.005" larger in the chamber base dimension than the x40.....some are within 0.001" or the same, it's just hit or miss with what original "300" reamer was used, and how "straight" the chamber was cut... In the examples that are 0.005" larger than the x40, when added to the 0.004" expected "oversize" a chamber with a total of 0.009" oversize at the base dimension.....in most chambers it's not a problem, but there are the 300 chambers that the rear dimension can see brass failures sooner being used as a x40.... A quick check is to measure the mouth ID of the 300 chamber and compare it to the mouth ID of the x40 sizing die.....the chamber mouth ID should be about 0.002" to 0.004"larger than the sizing die mouth ID..... Some just end up rechambering better than others..... |
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NY, USA
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Posted: 6/17/2013 6:44:35 PM EDT
[#46]
Do you have a set of dies handy to check, the breech end of the chamber is .378" with .007" of the head of the case above the breech end of the barrel.
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NY, USA
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Posted: 6/17/2013 6:50:49 PM EDT
[#47]
The specs giving to me by PTG for the 762x40WT RevD show a breech dia of .3776, so my dia of .378" should be ok
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Posted: 6/17/2013 11:50:53 PM EDT
[#48]
Originally Posted By talonxracer:
The specs giving to me by PTG for the 762x40WT RevD show a breech dia of .3776, so my dia of .378" should be ok 7.62x40 RevC should be the WT 7.62x40 RevD was drawn to work with .310" barrel blanks and bullets....and other special applications.... but the base dimension should be the same....die opening should be ~ .374" - .375", for two or three thow sizing..... |
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NY, USA
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Posted: 6/18/2013 1:00:42 PM EDT
[#49]
Do you have a drawing for the brass/cartridge specs?
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Posted: 6/18/2013 1:35:06 PM EDT
[#50]
Originally Posted By talonxracer:
Do you have a drawing for the brass/cartridge specs? If you're asking about the "x40" I have several different mechanical drawings that represent the brass/cartridge dimensions of the different renditions that have been done over the years.....they're all a little different and optimized for a particular platform (semi-auto or bolt-action) or barrel type.....kinda look like a "T" drawing.... If you're asking about the "WT" there was one around....I don't have a copy of it, but a Google images search for '7.62x40 WT' turns one up.... Google 7.62x40 WT |
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