Brass identification thread

[km04]

I was cleaning up some .308 and 30-06 brass and found some brass I cannot identify, must have picked up someone else's brass when grabbing mine. It will accept a .30 cal bullet and the case size is bigger than .308 but smaller than 30-06. The markings are as follows; Left side T, top 3, right side T, and bottom 82. There is a 2 at about the 5 o'clock position, between the 82 and the second T. I will try to attach a picture, but not sure it will.

 

[Doco Overboard]

8mm maybe

 

[4g64loser]

Without case head diameter, extractor groove diameter, and length measurements, it's hard to say for sure. Assuming that since OP references 308 and 3006 the case head is a .473 I will offer the following thoughts:

If the case mouth just accepts a .308 diameter bullet, it is not 8x57 mauser as that bullet is larger and the fired case would have quite a bit of wiggle room if you put a thirty cal pill down into it.

Though I can't identify the headstamp from memory, I suspect that if it is a .30 cal round you have a piece of 7.65 argentine (sometimes also called belgian).

 

[Blacksmith101]

This might help:

Headstamp Codes - International Ammunition Association

Premier cartridge collecting site covering all types and forms of ammunition and their history, manufacture, markings and variations

www.cartridgecollectors.org

 

[dieselfarmboy]

That headstamp seems very hard to find.

 

[Rocinante]

7.5x55 Swiss

 

[Art3]

7.5x55 Swiss

Without any more pictures or dimensions, that would be my guess, especially since it isn't (or wasn't...until recently) super uncommon.

 

[km04]

Thanks to everyone who has replied. I will measure the case and get a pic of the whole case up.

 

[km04]

I'm back. Here are the measurements;
C.O.L. 2.180"
Case mouth 0.340"
Neck 0.300"
Shoulder 0.130"



.308 on the left, 30-06 on the right, mystery case is in the middle.

 

[Art3]

my calipers aren't as handy as my brass right now...but: .308, 7.5 Swiss,.30-06. Looks pretty darn close.

 

[Art3]

Also, no pics (why though?) but this looks similar:

Swiss Rifles dot com-GP11 Headstamp

I've got some GP11 brass here I'm going to reload. The interesting thing is that it's got a two stamped at the 4:00-5:00 position (between the year an

www.tapatalk.com

 

[4g64loser]

Based on length, it's 7.5 swiss. The spec length for that case is 2.185 so you are right there.

If the case head is a whisker under .500 instead of the .473 of the 308 and 3006, it's confirmed.

 

[TheLizardKing]

i was thinking maybe 8mm mauser, but now i'm leaning 7.5 swiss after checking out Art3's link.

If it is gp-11, i believe those were berdan primed

 

[Blacksmith101]

More about the 7.5 Swiss:

Swiss Handguns 1882

 

[km04]

Thanks guys. I appreciate all of the help.

 

[km04]

Also, no pics (why though?) but this looks similar:

Swiss Rifles dot com-GP11 Headstamp

I've got some GP11 brass here I'm going to reload. The interesting thing is that it's got a two stamped at the 4:00-5:00 position (between the year an

www.tapatalk.com

This is it!!!! Thanks for the link.

 

[guzma393]

It is indeed GP11 brass and is berdan primed. I can put them to good use and take them off your hands if they are destined for the scrap bin. They can be convertted to boxer primed pockets using a lathe.

 

[Melnic]

It is indeed GP11 brass and is berdan primed. I can put them to good use and take them off your hands if they are destined for the scrap bin. They can be convertted to boxer primed pockets using a lathe.

Are you doing the work yourself with your own lathe?
I don't recall, but did you have a thread with your process?
I'm totally not going to go through that myself but am curious.

 

[guzma393]

Are you doing the work yourself with your own lathe?
I don't recall, but did you have a thread with your process?
I'm totally not going to go through that myself but am curious.

Correct, I convert them on my minilathe, but it can honestly be done with a drill press provided a proper centering jig or clamp. Process is pretty simple, drill a center flash hole, and then drill the berdan primer a bit undersized to SRP spec, then swage it to SRP spec. Can further refine the pocket with a primer pocket uniformer if needed. I've dabbled with using 22lr reloaders conversion sleeves before, and the converted berdan primer sleeve actually provides a more precise fit vs. the 22lr reloader conversion sleeves. If a LRP conversion is to be desired, a 22lr shell can be pressed in, cut flushed, then swaged.

Main benefit to this conversion is SRP pocket milsurp brass. I mainly reserve converted brass for reduced cast loads running at lower pressures utilizing fast burning pistol powders similar to bullseye burn-rates.