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Posted: 7/24/2014 11:02:23 AM EDT
[#1]
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I kept a few rounds. I can send you a couple of them. Quote HistoryQuoted:
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I'd like to take one of those sample rounds of that suspect ammo and chamber check in my EGW tool, pull it apart, weigh the charge, try to identify the powder, etc. I kept a few rounds. I can send you a couple of them. yeah if you don't mind i'll help split the shipping costs send me your paypal info. i'll analyze them, pic and post up the results on this thread |
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Posted: 7/24/2014 11:48:03 AM EDT
[#2]
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yeah if you don't mind i'll help split the shipping costs send me your paypal info. i'll analyze them, pic and post up the results on this thread Quote HistoryQuoted:
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I'd like to take one of those sample rounds of that suspect ammo and chamber check in my EGW tool, pull it apart, weigh the charge, try to identify the powder, etc. I kept a few rounds. I can send you a couple of them. yeah if you don't mind i'll help split the shipping costs send me your paypal info. i'll analyze them, pic and post up the results on this thread Thanks. I'm not worried about the shipping costs. Since I'm new to posting, do I just use the email tab to contact you for the address? Will it have to be UPS/Fedex ground with the ORM sticker? |
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Posted: 7/24/2014 11:54:37 AM EDT
[#3]
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For the love of God, why the hell would you try to use the barrel or extension after that severe of a failure? Why not take the chance of saving a few bucks and shoot the same ammo suspected of causing the failure? The guy just won the lottery by walking away with scratches! Quote HistoryQuoted:
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You still have some of the barrel extension. You could potentially try to headspace it. unless it is way way out, I would suspect the ammo. For the love of God, why the hell would you try to use the barrel or extension after that severe of a failure? Why not take the chance of saving a few bucks and shoot the same ammo suspected of causing the failure? The guy just won the lottery by walking away with scratches! this x1000. barrels are cheap compared to the testing that would need to be done to make sure it is safe and repair that one. |
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Posted: 7/24/2014 11:55:44 AM EDT
[#4]
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If I had done the mag well grip, I would probably be missing a hand  Quote HistoryQuoted:
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Jesus, glad you have all your digits  If I had done the mag well grip, I would probably be missing a hand the first time i saw a case rupture i learned the magwell grip is a REALLLLY bad idea. really bad. |
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Posted: 7/24/2014 11:59:30 AM EDT
[#5]
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This is a serious question. Have you intentionally fired a bullet that's set back? If not, would you do so while filming it to show us it is harmless? Quote HistoryQuoted:
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Here's a round of M193. I hammered the 55gr bullet into the cartridge as far as it would go, then I pulled it. It to 3 wacks with my bullet puller where my uncrimped reloads take about 6. First thing that will happen, if you fired this cartridge, would be the bullet being pushed into the lands and grooves. Second it would fly the the end of the barrel. It in itself would not blow up your rifle. Many guys reload compressed loads with never an issue. I don't really care what camp you're in but bullet setback was not the issues of this rifles demise. Unknown fast/mixed/pistol/whatever powder and unknown casing details is most likely the issue. Blowing up an AR is not as easy as you may think. http://area7precision.us/images/bs2.jpg http://area7precision.us/images/bs1.jpg This is a serious question. Have you intentionally fired a bullet that's set back? If not, would you do so while filming it to show us it is harmless? i recall a thread years ago discussing that very thing and IIRC the pressure spike from a compressed round is still well below that of a typical proof round on a 223. |
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Posted: 7/24/2014 12:05:39 PM EDT
[#6]
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i recall a thread years ago discussing that very thing and IIRC the pressure spike from a compressed round is still well below that of a typical proof round on a 223. Quote HistoryQuoted:
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Here's a round of M193. I hammered the 55gr bullet into the cartridge as far as it would go, then I pulled it. It to 3 wacks with my bullet puller where my uncrimped reloads take about 6. First thing that will happen, if you fired this cartridge, would be the bullet being pushed into the lands and grooves. Second it would fly the the end of the barrel. It in itself would not blow up your rifle. Many guys reload compressed loads with never an issue. I don't really care what camp you're in but bullet setback was not the issues of this rifles demise. Unknown fast/mixed/pistol/whatever powder and unknown casing details is most likely the issue. Blowing up an AR is not as easy as you may think. http://area7precision.us/images/bs2.jpg http://area7precision.us/images/bs1.jpg This is a serious question. Have you intentionally fired a bullet that's set back? If not, would you do so while filming it to show us it is harmless? i recall a thread years ago discussing that very thing and IIRC the pressure spike from a compressed round is still well below that of a typical proof round on a 223. And will not blow the extension in half. |
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Posted: 7/24/2014 1:20:52 PM EDT
[#7]
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I kept a few rounds. I can send you a couple of them. Quote HistoryQuoted:
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I'd like to take one of those sample rounds of that suspect ammo and chamber check in my EGW tool, pull it apart, weigh the charge, try to identify the powder, etc. I kept a few rounds. I can send you a couple of them. How about some pics of said rounds? |
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Posted: 7/24/2014 3:11:01 PM EDT
[#8]
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How about some pics of said rounds? Quote HistoryQuoted:
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I'd like to take one of those sample rounds of that suspect ammo and chamber check in my EGW tool, pull it apart, weigh the charge, try to identify the powder, etc. I kept a few rounds. I can send you a couple of them. How about some pics of said rounds? Here you go!href=http://i40.photobucket.com/albums/e206/docxylo/23_zps728ed4a4.jpg" /> href=http://i40.photobucket.com/albums/e206/docxylo/34_zpsd1fbfd0d.jpg" /> href=http://i40.photobucket.com/albums/e206/docxylo/3_zps21276b45.jpg" /> |
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Posted: 7/24/2014 3:44:29 PM EDT
[#9]
Do you have any way to pull the bullets?
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Posted: 7/24/2014 3:46:38 PM EDT
[#10]
I'm wondering if the case that blew, was annealed WAY too much and was really brittle.
Also OP, Did you buy their "New" or "remanufactured" ammo? Because those pictures look like virgin brass. |
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Posted: 7/24/2014 4:16:53 PM EDT
[#11]
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I'm wondering if the case that blew, was annealed WAY too much and was really brittle. Also OP, Did you buy their "New" or "remanufactured" ammo? Because those pictures look like virgin brass. Military Ballistics Industries "remanufactured" ammo bought from Lucky Gunner about 4-5 years ago when I could not find any ammo due to Obama. That's the ONLY reloads I've ever bought. Learned my lesson... |
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Posted: 7/24/2014 4:18:15 PM EDT
[#12]
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Do you have any way to pull the bullets? I got a puller but I don't reload and I really don't know much about the different powders. |
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Posted: 7/24/2014 4:24:31 PM EDT
[#13]
If you pull a bullet, take a close up picture of the powder dumped on a piece of white paper.
There are people on the forum who can tell you if it "looks" right. At least it should look like little balls, drums, or cylinders. If it looks like flakes or donuts it's not the right stuff. |
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Posted: 7/24/2014 4:31:52 PM EDT
[#14]
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Military Ballistics Industries "remanufactured" ammo bought from Lucky Gunner about 4-5 years ago when I could not find any ammo due to Obama. That's the ONLY reloads I've ever bought. Learned my lesson... Quote HistoryQuoted:
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I'm wondering if the case that blew, was annealed WAY too much and was really brittle. Also OP, Did you buy their "New" or "remanufactured" ammo? Because those pictures look like virgin brass. Military Ballistics Industries "remanufactured" ammo bought from Lucky Gunner about 4-5 years ago when I could not find any ammo due to Obama. That's the ONLY reloads I've ever bought. Learned my lesson... Hmm, I wonder how the are getting the crimp to look brand new. It looks like they either used virgin or pull down brass that was never fired. |
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Posted: 7/24/2014 5:04:21 PM EDT
[#15]
Quote HistoryQuote HistoryQuoted:
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I'd like to take one of those sample rounds of that suspect ammo and chamber check in my EGW tool, pull it apart, weigh the charge, try to identify the powder, etc. I kept a few rounds. I can send you a couple of them. How about some pics of said rounds? Here you go!http://<a href=http://i40.photobucket.com/albums/e206/docxylo/23_zps728ed4a4.jpg</a>" /> http://<a href=http://i40.photobucket.com/albums/e206/docxylo/34_zpsd1fbfd0d.jpg</a>" /> http://<a href=http://i40.photobucket.com/albums/e206/docxylo/3_zps21276b45.jpg</a>" /> OP: The round on the bottom right there still has the primer sealant on it doesn't it? That isn't a re-manufacturer round I don't believe so did it come with the rest of the ammo? If so that is very weird. |
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Posted: 7/24/2014 5:16:12 PM EDT
[#16]
Quote HistoryQuoted: OP: The round on the bottom right there still has the primer sealant on it doesn't it? That isn't a re-manufacturer round I don't believe so did it come with the rest of the ammo? If so that is very weird. Quote HistoryQuoted: Quoted: Quoted: How about some pics of said rounds? Here you go!http://<a href=http://i40.photobucket.com/albums/e206/docxylo/23_zps728ed4a4.jpg</a>" /> http://<a href=http://i40.photobucket.com/albums/e206/docxylo/34_zpsd1fbfd0d.jpg</a>" /> http://<a href=http://i40.photobucket.com/albums/e206/docxylo/3_zps21276b45.jpg</a>" /> OP: The round on the bottom right there still has the primer sealant on it doesn't it? That isn't a re-manufacturer round I don't believe so did it come with the rest of the ammo? If so that is very weird. See Gim's post above. It's possible they used pulled down mil brass cases that were primed, sealed, and crimped already. They probably just neck sized them, loaded in some powder, and seated projos. |
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Posted: 7/24/2014 5:16:18 PM EDT
[#17]
Casings look longer than 1.760" to anyone? They don't look like they ever been trimmed. Once fired, FL sized, no trim? Nancy Drew?
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Posted: 7/24/2014 5:23:14 PM EDT
[#18]
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I'm wondering if the case that blew, was annealed WAY too much and was really brittle. Also OP, Did you buy their "New" or "remanufactured" ammo? Because those pictures look like virgin brass. a regular case failure shouldn't have done that much damage. that was a MASSIVE over pressure. |
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Posted: 7/24/2014 5:50:43 PM EDT
[#19]
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I got a puller but I don't reload and I really don't know much about the different powders. Quote HistoryQuoted:
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Do you have any way to pull the bullets? I got a puller but I don't reload and I really don't know much about the different powders. There's a bunch of us here that do. 
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Posted: 7/24/2014 5:51:22 PM EDT
[#20]
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OP: The round on the bottom right there still has the primer sealant on it doesn't it? That isn't a re-manufacturer round I don't believe so did it come with the rest of the ammo? If so that is very weird. Quote HistoryQuoted:
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I'd like to take one of those sample rounds of that suspect ammo and chamber check in my EGW tool, pull it apart, weigh the charge, try to identify the powder, etc. I kept a few rounds. I can send you a couple of them. How about some pics of said rounds? Here you go!http://<a href=http://i40.photobucket.com/albums/e206/docxylo /23_zps728ed4a4.jpg</a>" /> http://<a href=http://i40.photobucket.com/albums/e206/docxylo/34_zpsd1fbfd0d.jpg</a>" /> http://<a href=http://i40.photobucket.com/albums/e206/docxylo/3_zps21276b45.jpg</a>" /> OP: The round on the bottom right there still has the primer sealant on it doesn't it? That isn't a re-manufacturer round I don't believe so did it come with the rest of the ammo? If so that is very weird. I pulled those 5 rounds from one of the 5 sealed bags that I have left from the original 1,000 rounds. Each bag has 100 rounds and looks just like the bag in the first pics on the post. |
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Posted: 7/24/2014 7:10:32 PM EDT
[#21]
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"I joined here to expand my knowledge...but I don't care what the rest of you think or say". Brilliant. If only 1/8" of the tip of the bullet is visible, that's way beyond "setback". Quote HistoryQuoted:
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I really don't care what any of the rest of you think or say here about bullet setback not causing kabooms,. I think all your points and info are very valuable. Thanks for your post! No problem Doc, you're welcome! I just get aggravated with some of the holier than thou BS that goes on here sometimes!!! I joined ARFCOM to expand my knowledge, not to close my mind to others with some knowledge, experience, and common sense. Some people here tend to think your join date and post count indicate your level of knowledge and experience with AR's and firearms in general, I tend to think those guys are full of shit. "I joined here to expand my knowledge...but I don't care what the rest of you think or say". Brilliant. Quoted:
Good post man. Thanks for sharing. I agree. Bullet setback is a huge problem. It's ridiculous to think something as ridiculous as "it doesn't matter with boat tails." REALLY!? When the projectile is set back to the point where only 1/8" of the tip is above the rim, the boat tail is not enough to make up for that kind of reduction in volume available for gas expansion...not even close. Thanks again for sharing your experience. If only 1/8" of the tip of the bullet is visible, that's way beyond "setback". Awesome Quote, it's almost what I actually said, have you ever written political speeches? |
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Posted: 7/24/2014 7:26:18 PM EDT
[#22]
That looks like one hell of a squib round. You have ears and eyes on? Any injuries? Head ache? ringing ears? No I'm not a layer, Just never had a KB thank god.
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Posted: 7/24/2014 8:03:52 PM EDT
[#23]
I see you don't have irons on your carbine, I assume you had optic on when your kaboom happend.
How did it fare? |
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Posted: 7/24/2014 8:20:28 PM EDT
[#24]
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That looks like one hell of a squib round. You have ears and eyes on? Any injuries? Head ache? ringing ears? No I'm not a layer, Just never had a KB thank god. Had ears and eyes. No significant injury thank God. |
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Posted: 7/24/2014 8:27:47 PM EDT
[#25]
I am also questioning the pictured "AAC 83" headstamped ammo.
"AAC 83 Ball fmj cl b/rd 1881 Made inexpensively in Yugoslavia for export to American Armaments Corp., a subsidiary of Nordac Mfg Corp, Fredericksburg, VA, Nordac sold $4.7 million worth of these cartridges to El Salvador in 1984 as if they were more expensive U.S. manufactured rounds for use in their U.S. made M-16 rifles. The Salvadorian rifles jammed when these rounds were first used. The Foreign Military Sales Credit Program required buying U.S. manufactured goods. It turned out that these rounds were of good quality but that they violated the FMS contract requirement. John Straighton was indicted in May 1986. He had the rounds headstamped AAC for American Ammunition Company, in hopes of having the appearance of rounds made in the USA." I could be completely wrong ..but..... it appears "American Ammunition Company" is connected to A-Merc.... https://www.google.com/search?q=AMERC+is+American+ammunation+company%3F&sourceid=ie7&rls=com.microsoft:en-US:IE-Address&ie=&oe=&gws_rd=ssl#q=A-MERC+is+American+ammunition+company%3F&rls=com.microsoft:en-US:IE-Address BTW... this is not the first time I have read this little tidbit.... "Lucky Gunner, Military Ballistics Industries, Ammo.net, BulkAmmo.com, AmmoforSale.com, GunsforSale.com, were all the same company " http://www.wallsofthecity.net/2011/07/update-and-further-motivation.html#comments Look up each ones street address... Do a street view of said address... and you will see.... UPS Stores, P.O. Boxes, etc. ...no store fronts. https://tnbear.tn.gov/Ecommerce/FilingDetail.aspx?CN=003243203227040152221236125224248007098151202061 Click on the history tab... and click on all the "details" tabs. This brass is out there.... 
After everything I just read... I am seriously doubting the MBI ammo. |
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Posted: 7/24/2014 8:27:49 PM EDT
[#26]
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I see you don't have irons on your carbine, I assume you had optic on when your kaboom happend. How did it fare? I was just testing the rifle since it was a new build and I didn't put any optics on it. I was just sending rounds down into a giant pit. Aiming about 1 inch high of the flat top and I actually hit a couple of cans floating on the water in the pit. Until I got the Kaboom. Then the fun was over, at least for a few minutes. When I recovered from the shock and changed my underwear, we blew a tv with tannerite... ;) |
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Posted: 7/24/2014 8:29:59 PM EDT
[#27]
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Posted: 7/24/2014 8:30:57 PM EDT
[#28]
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I am also questioning the pictured "AAC 83" headstamped ammo. "AAC 83 Ball fmj cl b/rd 1881 Made inexpensively in Yugoslavia for export to American Armaments Corp., a subsidiary of Nordac Mfg Corp, Fredericksburg, VA, Nordac sold $4.7 million worth of these cartridges to El Salvador in 1984 as if they were more expensive U.S. manufactured rounds for use in their U.S. made M-16 rifles. The Salvadorian rifles jammed when these rounds were first used. The Foreign Military Sales Credit Program required buying U.S. manufactured goods. It turned out that these rounds were of good quality but that they violated the FMS contract requirement. John Straighton was indicted in May 1986. He had the rounds headstamped AAC for American Ammunition Company, in hopes of having the appearance of rounds made in the USA." Awesome research! |
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Posted: 7/24/2014 8:50:53 PM EDT
[#29]
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Posted: 7/24/2014 9:47:00 PM EDT
[#30]
Quote HistoryQuoted: I got a puller but I don't reload and I really don't know much about the different powders. Quote HistoryQuoted: Quoted: Do you have any way to pull the bullets? I got a puller but I don't reload and I really don't know much about the different powders. |
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Posted: 7/24/2014 10:05:06 PM EDT
[#31]
Quote HistoryQuoted:
I am also questioning the pictured "AAC 83" headstamped ammo. "AAC 83 Ball fmj cl b/rd 1881 Made inexpensively in Yugoslavia for export to American Armaments Corp., a subsidiary of Nordac Mfg Corp, Fredericksburg, VA, Nordac sold $4.7 million worth of these cartridges to El Salvador in 1984 as if they were more expensive U.S. manufactured rounds for use in their U.S. made M-16 rifles. The Salvadorian rifles jammed when these rounds were first used. The Foreign Military Sales Credit Program required buying U.S. manufactured goods. It turned out that these rounds were of good quality but that they violated the FMS contract requirement. John Straighton was indicted in May 1986. He had the rounds headstamped AAC for American Ammunition Company, in hopes of having the appearance of rounds made in the USA." I could be completely wrong ..but..... it appears "American Ammunition Company" is connected to A-Merc.... https://www.google.com/search?q=AMERC+is+American+ammunation+company%3F&sourceid=ie7&rls=com.microsoft:en-US:IE-Address&ie=&oe=&gws_rd=ssl#q=A-MERC+is+American+ammunition+company%3F&rls=com.microsoft:en-US:IE-Address BTW... this is not the first time I have read this little tidbit.... "Lucky Gunner, Military Ballistics Industries, Ammo.net, BulkAmmo.com, AmmoforSale.com, GunsforSale.com, were all the same company " http://www.wallsofthecity.net/2011/07/update-and-further-motivation.html#comments Look up each ones street address... Do a street view of said address... and you will see.... UPS Stores, P.O. Boxes, etc. ...no store fronts. https://tnbear.tn.gov/Ecommerce/FilingDetail.aspx?CN=003243203227040152221236125224248007098151202061 Click on the history tab... and click on all the "details" tabs. This brass is out there.... https://sites.google.com/site/xr650rsale/_/rsrc/1299305912924/home/AAC_Ammo_01.jpg After everything I just read... I am seriously doubting the MBI ammo. Wow, excellent research. |
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Posted: 7/24/2014 10:06:10 PM EDT
[#32]
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Send the rounds off as discussed earlier, don't want you pulling them with your Leatherman. Quote HistoryQuoted:
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Do you have any way to pull the bullets? I got a puller but I don't reload and I really don't know much about the different powders. Was planning on using my teeth...
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Posted: 7/24/2014 10:19:57 PM EDT
[#33]
Regardless, bullet setback doesn't affect rifle bullets as severely as pistol rounds.
If you think about the differences in bullet square area vs casing capacity - you can easily see why. That's why (when combined with the other info provided) we can pretty much eliminate bullet set back vs a wrong charge. |
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Posted: 7/24/2014 10:24:01 PM EDT
[#34]
Quote HistoryQuoted: Was planning on using my teeth... Quote HistoryQuoted: Quoted: Quoted: Quoted: Do you have any way to pull the bullets? I got a puller but I don't reload and I really don't know much about the different powders. Was planning on using my teeth... Seriously interested in the outcome of the round review.
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Posted: 7/25/2014 1:21:38 AM EDT
[#35]
Quote HistoryI've honestly thought this myself. We did it in Vietnam too. Had some success with it. |
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Posted: 7/25/2014 5:45:45 AM EDT
[#36]
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He would have had to manually attempt to chamber the failure round over the stuck (unfired) round, which is not what happened as I am told. I understand your scenario but do not think that's what happened. Talking to others who were on site they described the proceeding shots as "incredibly loud" even through ear muffs, to the point where one shooter took a step back on the line even before the KB because the report was so loud. These guys are all seasoned AR and large caliber shooters, quite familiar with normal muzzle decibels and concussion. Prior to knowing that I would have voted barrel obstruction very close to the round resulting in over pressure back towards the chamber, but hearing the field report I am inclined to vote overcharge with pistol powder as others have pointed out. Quote HistoryQuoted:
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I have investigated a fair few incidents and I do not believe the cause here is either headspace or projectile setback in the case. While projectile setback certainly that will cause a pressure spike, the damage we are seeing here is much more severe than I have ever seen with that sort of event or improper headspace. A heavy charge of fast pistol powder is certainly a good possibility. Here's another possibility. I have seen a couple of cases where the shooter had a an unfired cartridge fail to eject and when the action was closed it attempted to chamber the next round. The tip of the projectile on the second round struck the primer of the round already in the chamber and both functioned. That receiver was much more heavily built and it suffered significant damage - though not as bad as that one. Add in a lightweight magnesium receiver and you could get that sort of damage. . Talking to others who were on site they described the proceeding shots as "incredibly loud" even through ear muffs, to the point where one shooter took a step back on the line even before the KB because the report was so loud. These guys are all seasoned AR and large caliber shooters, quite familiar with normal muzzle decibels and concussion. Prior to knowing that I would have voted barrel obstruction very close to the round resulting in over pressure back towards the chamber, but hearing the field report I am inclined to vote overcharge with pistol powder as others have pointed out. Given this additional information, I am inclined to agree that my alternate scenario is unlikely. |
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Posted: 7/25/2014 7:40:47 AM EDT
[#37]
if AMERC brass was used that could certainly be one issue. that stuff is well known to be crap. add in a wrong powder load and you got a mini grenade in the chamber.
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Posted: 7/25/2014 9:03:32 AM EDT
[#38]
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if AMERC brass was used that could certainly be one issue. that stuff is well known to be crap. add in a wrong powder load and you got a mini grenade in the chamber. I'm not saying it is A-MERC brass, it is certainly from Yugo. , but I am kind of seeing a possible A-Merc connection..... that is scary enough. Seriously,...Where has this "AAC 83" Yugo brass been all these years ? How is it just now showing up in re-manufactured ammo ? How has it been stored ? Is it possible that it was just pulled down and some of the powder was still in the case ? What Yugo powder was in the case ? Was said powder reused ? If so has the powder deteriorated to a explosive / unstable / unsuitable state ? If the same amount of lack of care went into the reloading of this MBI ammo as A-Merc stuff then I wouldn't touch it with a ten foot pole. I am also disturbed by Lucky Gunners "less than forthright" affiliation with MBI and their various other No-store front companies. I am not saying they are a bad group ... just that I don't like sneaky companies. |
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Posted: 7/25/2014 9:47:15 AM EDT
[#39]
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Posted: 7/25/2014 9:47:47 AM EDT
[#40]
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Posted: 7/25/2014 9:54:50 AM EDT
[#41]
That one looks normal.
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Posted: 7/25/2014 10:06:27 AM EDT
[#42]
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That one looks normal. The 500 he fired before the KB were probably normal too. And the other 490+ might be. There was sure something wrong with that one round, but he could pull the rest and they may all be fine. |
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Posted: 7/25/2014 10:26:58 AM EDT
[#43]
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The 500 he fired before the KB were probably normal too. And the other 490+ might be. There was sure something wrong with that one round, but he could pull the rest and they may all be fine. Quote HistoryQuoted:
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That one looks normal. The 500 he fired before the KB were probably normal too. And the other 490+ might be. There was sure something wrong with that one round, but he could pull the rest and they may all be fine. Yup, it only takes one... |
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Posted: 7/25/2014 11:06:24 AM EDT
[#44]
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I've honestly thought this myself. We did it in Vietnam too. Had some success with it. Quote HistoryQuoted:
I've honestly thought this myself. We did it in Vietnam too. Had some success with it. I was told to keep my cock holster shut about this. I'm suprised some asshole is posting that on the internet. |
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Posted: 7/25/2014 1:07:43 PM EDT
[#45]
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I was told to keep my cock holster shut about this. I'm suprised some asshole is posting that on the internet. That information has been out there for a long time.............. Spiking ammo even longer, well before the internet, maybe even before electricity. 
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Posted: 7/27/2014 1:05:37 PM EDT
[#46]
Please keep us posted on this Kaboom. I am very curios what "MBI" has to say.
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Posted: 7/27/2014 1:30:28 PM EDT
[#47]
Quote HistoryQuoted:
That information has been out there for a long time.............. Spiking ammo even longer, well before the internet, maybe even before electricity. Quote HistoryQuoted:
Quoted:
I was told to keep my cock holster shut about this. I'm suprised some asshole is posting that on the internet. That information has been out there for a long time.............. Spiking ammo even longer, well before the internet, maybe even before electricity. yea thats been well known for years. |
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Posted: 7/27/2014 5:39:08 PM EDT
[#48]
lots of lightweight parts did you get to weigh it before hand.
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Posted: 7/27/2014 7:21:01 PM EDT
[#49]
Another possible cause would be a high primer. I ran a series of tests a while back and found that when I seated the primer in an case slightly above the base of the primer pocket I could cause a out of battery firing when the firing pin struck the primer when the round was being chambered if there was any resistance to the case being seated properly in the chamber. I ran the tests with empty cases and primers seated to various depths. I also ran a series of tests with the bullet set back into the case at various depths and found it that while it would affect proper feeding of the round, it didn't seem to cause any change in the firing. However, I use 26 grains of WW 748 in all my loads so I am basically running a compressed charge of powder anyway.
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Posted: 7/28/2014 12:50:01 AM EDT
[#50]
Quote HistoryQuoted:
Talking to others who were on site they described the proceeding shots as "incredibly loud" even through ear muffs, to the point where one shooter took a step back on the line even before the KB because the report was so loud. These guys are all seasoned AR and large caliber shooters, quite familiar with normal muzzle decibels and concussion. Prior to knowing that I would have voted barrel obstruction very close to the round resulting in over pressure back towards the chamber, but hearing the field report I am inclined to vote overcharge with pistol powder as others have pointed out. Wow. Just contemplate that the rifle may have fired several extreme overpressure rounds before one had a case separation leading to KB. |
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