What might have caused this?

[Eargasm]

I picked this up at the range. It's a LC .223 case. What I'm wondering about is, why is it concave around the edge of the primer pocket? At first I thought someone might have enlarged it to fit a large rifle primer, but the diameter is still the size of a SR primer.

Thoughts?



Thanks.

[swifty]

The military crimp was removed, plus a lot of additional brass.

[bohoki]

the previous person reamed the hell out of it with what looks like a counter sink

cause they were sick of *****footing with a little pocket cleaner and having their primers crushed from the remaining crimp

[killshot44]

You can ream the hell out of the pockets with the Dillon swager, too.

/don't ask how I know....

[brianinca]

That's why the RCBS case prep station has an adjustable depth on the crimp cutter heads - but I prefer the swager they sell, why remove brass if you don't have to?

Regards,
Brian in CA

[xrMike]

Looks like the guy was countersinking for a screw he forgot to put through the flash hole.

[Brd_Hntr]

Crimp removed using a Chamfer and Deburring Tool. I've done it. It works. It is hard to tell from the image how much primer pocket was lost, but perhaps stop using the Makita.

[ejor]

a counter sink works good but maybe not so deep, lol

[xfer42]

A little late, but definately reamed with a counter sink. I do the same, just not as deep.

*Dropping powder in .44 mag in the backyard today. Beautiful day here in San Jose.*

[toby]

Wow, that first pic was way more than needed! I personally don't bother with this type of brass.

[Munk]

A little late, but definately reamed with a counter sink. I do the same, just not as deep.

*Dropping powder in .44 mag in the backyard today. Beautiful day here in San Jose.*

Looking a your pic, the only thing I can think is... F-ing COBB. damn stuff is always in my flash holes.

[chim-chim7]

Hack.