40 S&W Resizing problem,added pic

[kenworth1114]

bought 500 pieces of range brass to reload 40 S$W for the first time and about one in four pieces won't resize, I end up with a ring of brass near the base of the shell, I had read that the Glock is hard on its 40 brass and am thinking these were fired in a Glock, anyone else run into this issue? I am using Redding carbide dies. Added picture,you can see the ring near the base ,its hard to see in the pic but there is a thin lip of brass that was pushed down at the bottom of the ring, to set up the die I put the ram in the fully raised position then screw in the die until it touches the shell holder then back off just so the dies does not contact the shell holder. After sizing the 500 pieces I had 99 that were messed up. Thanks for any advise.

[bsumoba]

are you checking in the chamber of your firearm or a case gauge?

you also might be setting up your die wrong. what is your process for setting up your resizing die?

[Pauliedad]

Crushing the case or case separation?

Ive reloaded range pick ups that have been "Glockified" with no issues.

Pics might help with input.

[J-cat]

That's normal for .40 fired through a Glock. You need a push through die like the Redding GRX.

[gemoose23]

Is it really a ring of brass at the bottom made by you, marks of the untouched resized brass, or you cant re-size the bulge?

[enzo357]

Might be a set up issue. Lot of us use Glock fired brass without problems.

[J-cat]

After seeing your pic, yep it's normal. Get a GRX.

[CalTeacher]

I've never had any glock brass do this. But if your brass is this bad then you can always get one of those push through dies like J-Cat suggested.

[rg1]

Any 40 brass that looks like that after I size gets scrapped. I buy once fired that's probably fired in multiple pistols or rifles and several look like your pic. The good cases from my purchased once fired do not show this sizing problem when fired in my Glock 23.

[3RDGEARGRNDRR]

yikes that looks horrible.
almost like you are resizing through a 9mm die .
maybe some case crushing going on as well?
Hard to believe this is that common.
did you clean these before trying to size them?
Sorry I don't load 40 yet, and by the looks of this,
I think Id save my self that headache

[cruddymutt]

It looks like it could be "Glocked" brass but I use a Lee die for 40 S&W and it resizes much lower down to the web. I have no issues with 'Glocked" brass. I set up my dies so the die touches the shell holder with the ram fully raised but NOT so that the press cams over.

[ElDub1950]

I thought the case bulge was solved after the Glock Gen 2s. I've never seen a problem with any brass of of my Gen 3s and certainly no problem resizing them with a Lee die. I'd have to wonder about the setup.

[J-cat]

The case bulge was solved. The chamber diameter did not change. Cases still expand to the same diameter, but they are better supported.

[Spyder]

I haven't had a single piece of my 40 brass look like that after sizing. All of it is fired out of Glocks. I'm curious to know what is causing it.

[J-cat]

It's too big for his sizer.