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Posted: 1/1/2014 2:15:08 PM EDT
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One of my reloads. Fired out of an M1A Scout. Didn't notice it until I policed my brass. All the same lot. 147 gr. bullet H335 powder 43.0 grains, trimmed and small base resized properly. All the other rounds fired normally from the magazine. No unusual recoil.
Notice how the very end of the case has a slight bevel. Primer is a little flatter then normal with a very marginal strike. 
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Quoted:
You've picked up someone elses brass, no way in hell could that be shot in your 308 chamber. The OAL also suggests that it was a 308 fired in an '06 chamber ETA, hold that case up next to a 30-36 case and you'll find out what the bevel is. I trust your opinion. Are you 100% sure though? There was no other brass on the ground and I did have a few times with that magazine where it fired but the bolt did not look 100% closed. Could it have been an out of battery firing? |
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Quoted:
You've picked up someone elses brass, no way in hell could that be shot in your 308 chamber. The OAL also suggests that it was a 308 fired in an '06 chamber ETA, hold that case up next to a 30-36 case and you'll find out what the bevel is. This ^^^ That's a .308 fired in a .30-06 all day long, or even a .270 Winchester. One of my neighbors who volunteers at a local range brought home a case looking exactly like this, only this one looks like it has been polished since then. Also, the primer isn't just "a little flat", it's flattened significantly, and that isn't a marginal strike. It's cratered. To normally generate enough pressure to crater a primer, you are well into the low-to-mid 60,000 psi range, and often higher, since many 65,000psi loads will dimple nicely, like the .270 Winchester. .308 case length is just over 2.000", like 2.015" max length, and 2.005" trim length. Even if your M1A could violently extract a case and blow out the shoulder to -06 shoulder length, the case would be unsupported and we would see evidence of that on the side walls. This case has beautifully smooth side walls. I just measured a .30-06 Springfield case, and it was 1.940" to the shoulder, and your OAL is 1.987". It was fired in a different chamber, either an -06 or .270 Winchester. |
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Quoted: You've picked up someone elses brass, no way in hell could that be shot in your 308 chamber. The OAL also suggests that it was a 308 fired in an '06 chamber ETA, hold that case up next to a 30-36 case and you'll find out what the bevel is. |
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Quoted:
Good call. As usual. Quoted:
Quoted:
You've picked up someone elses brass, no way in hell could that be shot in your 308 chamber. The OAL also suggests that it was a 308 fired in an '06 chamber ETA, hold that case up next to a 30-36 case and you'll find out what the bevel is. Well I guess it's possible, but I was sure I didn't pick up any other brass. |
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Quoted:
So let me see if I understand this. When the 308 cartridge tried to expand in the 06 chamber it basically separated at the shoulder? No. The 308 case blew it's neck out to the body and start of shoulder of the 30-06 chamber. So in other words the 308 case fire formed to as much of the 30-06 chamber as it could. |
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Quoted:
No. The 308 case blew it's neck out to the body and start of shoulder of the 30-06 chamber. So in other words the 308 case fire formed to as much of the 30-06 chamber as it could. Quoted:
Quoted:
So let me see if I understand this. When the 308 cartridge tried to expand in the 06 chamber it basically separated at the shoulder? No. The 308 case blew it's neck out to the body and start of shoulder of the 30-06 chamber. So in other words the 308 case fire formed to as much of the 30-06 chamber as it could. Ok, gotcha, I didn't think that through. If I had the two cartridges sitting next to each other I would see it. Too much NyQuil the last few days. |
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Quoted:
One of my reloads. Fired out of an M1A Scout. Didn't notice it until I policed my brass. All the same lot. 147 gr. bullet H335 powder 43.0 grains, trimmed and small base resized properly. All the other rounds fired normally from the magazine. No unusual recoil. Notice how the very end of the case has a slight bevel. Primer is a little flatter then normal with a very marginal strike. <a href="http://s222.photobucket.com/user/MAUSER888/media/IMG_1126_zpsc8095c31.jpg.html" target="_blank">http://i222.photobucket.com/albums/dd88/MAUSER888/IMG_1126_zpsc8095c31.jpg</a> <a href="http://s222.photobucket.com/user/MAUSER888/media/IMG_1129_zpsb55563cd.jpg.html" target="_blank">http://i222.photobucket.com/albums/dd88/MAUSER888/IMG_1129_zpsb55563cd.jpg</a> <a href="http://s222.photobucket.com/user/MAUSER888/media/IMG_1128_zps27260318.jpg.html" target="_blank">http://i222.photobucket.com/albums/dd88/MAUSER888/IMG_1128_zps27260318.jpg</a> Load that up with IMR 3031 and a 45 bullet and you have the 308/45 LUGERMAN thumper! |
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