9mm brass

[Catsmith]

Been going thru some brass that was thrown in a deal i got on some reloading eq. About a third of the 9mm has a ridge close to the bottom abou 1/4 around the case. Some iare barely there and some look almost cracked.

Any idea what this was caused by? I kept them but are not using them.

[hk33ka1]

Likely fired in a pistol without a fully supported chamber, known as a bulge. Some people fix them with a tool some people toss them.

[0verkill]

9mm Luger brass is usually thick enough not to do that. Could you report back with a headstamp?

[Catsmith]

90% winchester with a couple each RP, PMC and ppu. What kind or pistol does this? I don't want one. ;)

[kd185]

there are a few of them out there
glock being probable the most popular with an unsupported chamber

whats the primer strike look like
round, keyway or rectangle?

[captaint]

Sounds like your brass has been "Glocked". If it's not too bad, you can size and begin normal usage. Sometimes it's worse than that. When I find brass that has a pretty decent bulge, I just scrap it. enjoy Mike

[Shiloh]

there are a few of them out there
glock being probable the most popular with an unsupported chamber

whats the primer strike look like
round, keyway or rectangle?

Glock 9mm's really don't bulge. Glock .40's have a noticeable bulge.

Shiloh

[0verkill]

Catsmith, look at the primers. If it was fired in a Glock it will have a rectangular mark.

Kd185, what does the "keyway" mark look like and what brand causes it?