Bolt damage to primer cup?

[CKStephens]

Sorting .223/.556 brass, I keep finding these pieces that have this imprint on the bottom of the cartridge. Is this from the bolt or from the factory? I don't think I will reload these.

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[bionic knees]

l


examples of factory crimp

 

[CKStephens]

I'm speaking of the four impressions around the primer.

 

[Local Loader]

Mil-crimp for primers is what that is, it's easy to remove.

 

[kmk1012]

lView attachment 1160316


examples of factory crimp

Bottom right, thanks @bionic knees !!! @CKStephens, headstamps may differ but crimping style only has so many types.

 

[msgriff]

2017 Lake City 5.56 NATO with approved crimp (4). Adjust powder charge accordingly if you use them.

 

[DizzyJ]

Crimped primers. De-cap, remove crimp, reload.

Rinse and repeat.

 

[TTSX]

Those are speed notches. Genuine 5k ft/sec cartridge right there

 

[HighlandLofts]

The three point crimp are the 5,000 feet per second rounds, the four point crimps are the 10,000 feet per second rounds.

 

[Spitpatch]

I was gonna go with "performance indicator stamp". If you ever wondered about (or doubted) the guys that claim "half inch groups all day", this is the ammo they use.

 

[matts]

There's definitely marks on the cases from pressure on the bolt, im not sure that it matters, i have reloaded lots that looked like this, and have never had a case fail, not sure if its dangerous, just my experience with it.
Matt

 

[Mikej]

2017 Lake City 5.56 NATO with approved crimp (4). Adjust powder charge accordingly if you use them.

Heavier brass/slightly less case capacity?

 

[DirectDrive]

There's definitely marks on the cases from pressure on the bolt, im not sure that it matters, i have reloaded lots that looked like this, and have never had a case fail, not sure if its dangerous, just my experience with it.
Matt

I don't see any over-pressure marks (signs) on the OP's case.

 

[Certaindeaf]

Staked primers.

 

[CKStephens]

Thanks for the info. I have cut the crimp out of some of these but upon inspection found the primer pocket not very uniform and somewhat damaged by the scoring.

 

[bbbass]

The only crimped primers I have seen were ring crimps, and I found them too much of a PITA to deal with... tired of breaking decap pins.

 

[Tilos]

I'm speaking of the four impressions around the primer.

yep, primer crimp...
Look at the same brand unfired ammo, those marks are already there/not made by the gun/firing.
jmo,
.

 

[kmk1012]

The only crimped primers I have seen were ring crimps, and I found them too much of a PITA to deal with... tired of breaking decap pins.

I started using the Frankfort Arsenal hand depriming tool. That thing is a beast, removes crimped primers with ease.

 

[Local Loader]

I started using the Frankfort Arsenal hand depriming tool. That thing is a beast, removes crimped primers with ease.

That thing is awesome, I use it to deprime almost all my brass and just powers through anything.

 

[bbbass]

I started using the Frankfort Arsenal hand depriming tool. That thing is a beast, removes crimped primers with ease.

Thx for the info... unfortunately for me, bad arthur would keep me from using that... i hand prime, but doing so doesn't require much effort.