Anybody see 9mm brass like this?

I'm seeing 10 or so , out of about 300 cases I sweep up at the local indoor range ..../ i've loaded a few and they seemed fine but I didn't think it was a great design - and it made me wonder what the mfg was hiding / or covering up in their process with what looked like a 2 part case....

So i'm weeding them out in the sort after cleaning....putting them in scrap bin...
 
There is an error in this thread. A nine mm round does not have even a single c.f. of capacity, it holds less than 1 cc/milliliter.

On this same thought, I collected a pile of aguila brass, and already sized and expanded them, then boxed them. Is it possible that they will be unusable? Those cannelures bulged out a bit. Before I even think about loading them or giving them away, I need to make a few dummies to test.
 
They will separate during firing, after reloading, and leave you with a dead gun because of the sleeve stuck in the chamber. It is a PITA to get that sleeve out. A cleaning rod won't do it, one of the shooters at the last USPSA match ended up using a dental pick, because he didn't have a spare gun. It's not like pushing a squib out.
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I see that 9x45 understands the problem. I have had it happen to me twice. The first time was what I thought was a squib but the bullet exited the barrel and the next round attempted to load and I thought I had a FTF. I was able to lock the slide back and the round that was trying to go in the chamber was pried out with my pocket knife. The head of the bullet had lodged itself in the split casing and it came out with the bullet. Checked everything out and went back to shooting.

The second time it went poof when it should have gone bang and I thought I had squibbed. I field stripped it and looked down the barrel and saw the split case. I screwed around with it for about half an hour with a cleaning rod - no joy. Thant night I went to work on it with the dental pick and got it out in about an hour. Both times the bottom half ejected and was flung well out of my area to never be found. I got lucky the first time this happened.

As far as my loads they are usually in the middle to the low end of the published load range. I rarely have any loads that are on the upper end of pressure. When I do go into that area I will have new or once fired Speer or Win brass. At the time when these gave me problems I went through my brass and found about 40 cases and I dumped them all. They may work a few times or a dozen but when they do let loose it is a PIA to get a stuck case head out of the end of a chamber. 9mm cases are plentiful, it's not worth the headache to deal with them.
 
briandg said:
There is an error in this thread. A nine mm round does not have even a single c.f. of capacity, it holds less than 1 cc/milliliter.
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You're absolutely right. I was saying cc when I should have said grains. The FC brass I have averages 13.9 gr of water. The Ammoload brass that I had averaged 12.8 gr of water. Thanks for the correction. I have corrected my earlier post.
 
I should have noticed that the numbe matched grains of water.

After a freakin month of getting injections by iv as many times as one every hour, I know what a twenty cc hypodermic syringe looks like.
 
These start up companies, Freedom Munition (FM), AmmoLoad and IMT all have the same stepped case. They are complete junk. Why does anyone think no other ammo company makes their brass like that? They will separate during firing, after reloading, and leave you with a dead gun because of the sleeve stuck in the chamber. It is a PITA to get that sleeve out. A cleaning rod won't do it, one of the shooters at the last USPSA match ended up using a dental pick, because he didn't have a spare gun. It's not like pushing a squib out.
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What specifically makes this step cause case separations? The step is caused by an impact extrusion process. I personally reload 9mm brass until the case mouth starts to split, then it's worn out. I see no reason to sort these out of my rather extensive brass collection.
 
I've wondered myself. I suspect that the step allows the front section to expand first, then the back section. This should cause it to work harder at the belt. Brittle brass would separate if you work it too hard on such a small section. That's the only reason I CAN see
 
I've wondered myself. I suspect that the step allows the front section to expand first, then the back section. This should cause it to work harder at the belt. Brittle brass would separate if you work it too hard on such a small section. That's the only reason I CAN see
 
I personally reload 9mm brass until the case mouth starts to split, then it's worn out. I see no reason to sort these out of my rather extensive brass collection.
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The problem is that they do not split at the mouth like normal brass. They split at the step and usually all at once.
 
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