[Corner Pocket]

I was at the range the other day. A lady LEO was shooting a Glock 22 next to me. We chatted a bit about guns and stuff and I asked her whether she intended to keep her .40 brass. She replied that she would not keep it and that I was welcome to take it.

I picked it all up when she was through shooting. I just now decided to process the brass to get it ready to reload. I see that among the brass I obtained, I picked up 50 casings that have a strange rectangular stripe (http://www.freshonmymind.com/strange_primers/different.jpg) across the primer. I'm sure I've never seen any like this before, so thought I'd call out for some help from the gurus that hang out on here. I don't know whether the lady cop shot that brass, or whether it had been lying there before she began shooting. Thanks for any help! :D

Corner Pocket

[Dreaded]

perfectly normal.

Dreaded~

[SquirrelNuts]

That is from the striker in a Glock. It is a regular primer, but that is a distrinctive signature from a Glock. It is fine to use.

[Five of Clubs]

Agreed, the marks are from a Glock. Some of the case mouths may have a flat side too (and perhaps even a bulge at the base). Don't worry, your dies usually fix that stuff without any trouble. Shoot away!

[Corner Pocket]

I appreciate the replies, gents. You've educated me! :D

CP

[TAB]

Glockerized brass( 40) needs to go in the scrap bucket...

[RustyFN]

Glockerized brass( 40) needs to go in the scrap bucket...
I'll pay the shipping and take all the once fires 40 brass you want to throw away.
Rusty

[oneounceload]

Glockerized brass( 40) needs to go in the scrap bucket...

And why would that be? I have a 2nd gen G17 that I have had since new - all it gets is reloads...over and over again, range brass, once-fired, anything and everything and it has ALWAYS worked....more than I can say for my 1911

[rcmodel]

Glockerized brass( 40) needs to go in the scrap bucket...Thats crazy talk there!

rc

[FROGO207]

I had no idea anyone disliked Glocks that much. I do not own one but have used mucho brass from the local LE range that has been glockerized and it worked fine in my firearms for many many reloadings so far.

[TAB]

its not like or dislike.

every single 40 I have ever seen that had a ruptured case was once fired glock brass.

[rcmodel]

Thats probably because there is so dang much of it in use.

rc

[TAB]

Its also always been at a USPSA matchs. Since there are no LEA here using glocks, once fired glock brass is hard to come by locally.

[ar10]

Here's how you can fix the Glockerizing. Don' look at them. :D Works for me anyway.

[50calshooter]

Glocks do not support the case head on the 40 thats why they rupture and bulge. They are very hard on the brass.

[50calshooter]

Glock 40's do not support the case head and the chamber is larger to feed better, which is realy hard on brass

[FROGO207]

I have some in 40 S&W and 9mm from the local LE range (5 gallon Buckets full), the 9mm does not appear to be bulged out like the 40 can be. As I said before no problems yet. I will watch closely now though.

[ar10]

I've picked up, cleaned, sized, and head stamped sorted over 50 thousand .40SW cases shot from about every type of 40 cal gun that's made. Of all of those case I tossed out only a handful that were unusable, (I tossed all the RP's because of sizing problems).
After reading so many posts regarding bulged and/or split cases along with the Glock unsupported chamber issue, it seems to me Glocks are getting a bad rap.
FWIW I shoot only XD's and my main carry is a 40SW sub, and guess what, my primers strikes are rectangular and All semi-automatic handguns have some unsupported chambers, some more than others. :banghead: