Odd ball 9mm case

[Gingerkid]

I was reloading 9mm on the Dillon 550b this afternoon and the size/deprime operation binded up on me. I assumed it was a military headstamp crimped primer... But no, upon inspection the case had a thick wall at the base and then stepped down to normal thickness. I haven't been reloading very long but had never seen this before. Check it out.

[boombotz401]

New one for me, never seen that before


Sent from my iPhone using Tapatalk

[Sam]

Top secret case developed for the secret special assault tier 0.01 unit.

[.46caliber]

Sorry to link to outside source, but there is more info and pics here:

http://smith-wessonforum.com/reloadi...x19-brass.html

ETA: some have gotten gnarly splits at that shoulder. I'd just junk the stuff.

[LoboTBL]

I recently picked up a few of these at the range also. My best guess is that the design is to eliminate the issue of bullet setback. I'm going to start looking for this brass in .40S&W and .45ACP and see if it is present there also.

[themonk]

I have seen this before on rounds that are designed to be subsonic / super quiet. I always assumed it was to take up case volume.

[HackerF15E]

MAXXTECH 9mm has the same shelf, but in steel case.

[Gingerkid]

Top secret case developed for the secret special assault tier 0.01 unit.

Trouble maker moderator. Secret Agent Man!

[markm]

My best guess is that the design is to eliminate the issue of bullet setback.

Could be. When I was retarded and carried 1911 pistols... I though about this kind of case to prevent the 1911's horrible feed angle/setback.

[SeriousStudent]

Could be. When I was retarded and carried 1911 pistols... I though about this kind of case to prevent the 1911's horrible feed angle/setback.

WHAT?!?!? Blasphemy! That is God's pistol, mister!





I'm really new to the reloading game, so any time I see anything unusual, I put it to the side and stop. It's just not worth any kind of risk, in my very humble opinion.

I am going to look even closer at the brass coming out of the tumbler now. I do gather a lot of range pickup stuff. Thanks for the food for thought.