CBC case problems

larrymac1 · January 9, 2012, 09:41 AM

i started de-priming and resizing 9mm cases last night. Everything was cool then suddenly a case did not want to resize. I finished the stroke and the case has developed a ring/belt along the bottom of the case. I ran into 20 more cases that had some greater and lesser degree of this. All of the cases were CBC. Has anyone else experienced this? Is it somehting I am doing and not recognizing I am doing it? All other brands of cases resized without a problem and not all of the CBC were a problem. I will not be using those cases and will include some photos later if anyone is interested.

**Aguila Blanca** · January 9, 2012, 12:24 PM

I haven't encountered it, but it sounds like the bulge that can develop when a case is fired in a pistol that doesn't provide full, all-around case head support. It's very common in Glocks chambered for .40 S&W. Lee Precision (the reloading equipment company) has introduced a line of what they call "bulge buster" dies to deal with the problem.

FrankenMauser · January 9, 2012, 01:48 PM

Most of the CBC brass I have is fairly soft, and has a thin web. As such, it doesn't do well when fired in unsupported chambers.

The bulges are unsightly, annoying, and the death of the case. Chuck it.

Sevens · January 9, 2012, 02:17 PM

I have used CBC brass in a few of different chamberings and I've had no issues with it -- of course, I've not run any really hardcore loads in them that I can recall.

I have bulged 9mm brass before, and I did it with a pistol that is not a Glock. My best guess as to how is because the brass I was using may have been on the "small" side for internal capacity and the pressure rose and the brass left me evidence that the load was too much, even though I had used the same load in other brass.

This was not CBC brass.

If two piles of brass were sitting before me... one pile of CBC brass, once fired, any caliber... or twice as many in a pile of R-P, same caliber, also once-fired, I'd take the CBC every time and twice on Sundays.

larrymac1 · January 9, 2012, 03:25 PM

It is not a chambering problem. I have been firing this stuff for a while. I was a definate resizing problem. I had a mixture of cases fired the day before. Tumbled clean and removed the primer and resized the case. 22 CBC developed this belt at the lower edge of the case. They were fine until I started resizing them. Thanks for the responses so far. Hope this information helps put responses on the target.

FrankenMauser · January 10, 2012, 01:29 AM

Get us some photos.

January 9, 2012, 09:41 AM	#1
larrymac1 Junior Member Join Date: September 28, 2011 Posts: 2	CBC case problems i started de-priming and resizing 9mm cases last night. Everything was cool then suddenly a case did not want to resize. I finished the stroke and the case has developed a ring/belt along the bottom of the case. I ran into 20 more cases that had some greater and lesser degree of this. All of the cases were CBC. Has anyone else experienced this? Is it somehting I am doing and not recognizing I am doing it? All other brands of cases resized without a problem and not all of the CBC were a problem. I will not be using those cases and will include some photos later if anyone is interested.

January 9, 2012, 01:48 PM	#3
FrankenMauser Senior Member Join Date: August 25, 2008 Location: In the valley above the plain Posts: 13,427	Most of the CBC brass I have is fairly soft, and has a thin web. As such, it doesn't do well when fired in unsupported chambers. The bulges are unsightly, annoying, and the death of the case. Chuck it. __________________ Don't even try it. It's even worse than the internet would lead you to believe.

January 9, 2012, 02:17 PM	#4
Sevens Senior Member Join Date: July 28, 2007 Location: Ohio Posts: 11,756	I have used CBC brass in a few of different chamberings and I've had no issues with it -- of course, I've not run any really hardcore loads in them that I can recall. I have bulged 9mm brass before, and I did it with a pistol that is not a Glock. My best guess as to how is because the brass I was using may have been on the "small" side for internal capacity and the pressure rose and the brass left me evidence that the load was too much, even though I had used the same load in other brass. This was not CBC brass. If two piles of brass were sitting before me... one pile of CBC brass, once fired, any caliber... or twice as many in a pile of R-P, same caliber, also once-fired, I'd take the CBC every time and twice on Sundays. __________________ *Attention Brass rats and other reloaders:* I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.

January 9, 2012, 03:25 PM	#5
larrymac1 Junior Member Join Date: September 28, 2011 Posts: 2	CBC Problems It is not a chambering problem. I have been firing this stuff for a while. I was a definate resizing problem. I had a mixture of cases fired the day before. Tumbled clean and removed the primer and resized the case. 22 CBC developed this belt at the lower edge of the case. They were fine until I started resizing them. Thanks for the responses so far. Hope this information helps put responses on the target.

January 10, 2012, 01:29 AM	#6
FrankenMauser Senior Member Join Date: August 25, 2008 Location: In the valley above the plain Posts: 13,427	Get us some photos. __________________ Don't even try it. It's even worse than the internet would lead you to believe.

January 9, 2012, 12:24 PM	#2
Aguila Blanca Staff Join Date: September 25, 2008 Location: CONUS Posts: 18,479	I haven't encountered it, but it sounds like the bulge that can develop when a case is fired in a pistol that doesn't provide full, all-around case head support. It's very common in Glocks chambered for .40 S&W. Lee Precision (the reloading equipment company) has introduced a line of what they call "bulge buster" dies to deal with the problem.