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Eric D.
08-22-13, 23:19
Went out and did some shooting today. All my reloads - Wolf SRM's, 23.5 gr AA2230, 55 gr Z-max, LC headstamp with Nato cross. When I got home and was going though the brass I found a case that had split along its length. The split is only about 3/8" long, I didn't even notice it when shooting. I'm pretty sure this has happened at least once before but I don't have the case anymore. Has anyone had this happen to them? Any ideas on what causes it?

http://i.imgur.com/QMxx2LU.jpg
thopkins22
08-22-13, 23:27
How many reloads through it?

My GUESS if it's a relatively fresh case is that there was a slight flaw in the case going back to the moment it was drawn. Just a place that was too thin and this fact came to light however many reloads later.
Airhasz
08-23-13, 00:07
I've scrapped a couple of cases with similar failure. It did seem odd but I didn't pay too much attention to it as the cases had been reloaded around half a dozen times or more. Most of them just fail from cracks on the neck area.
P2000
08-23-13, 00:09
I had a case split like that too, slightly worse.

https://www.m4carbine.net/showthread.php?t=87911
Eric D.
08-23-13, 00:16
This was the second firing.


How many reloads through it?
Tzed250
08-23-13, 05:22
Is it possible the cases were sized too much?
Eric D.
08-23-13, 14:04
Measuring fired brass out of this particular barrel I'm getting a headspace of about 1.463 - 1.464. My goal for resizing is about 1.457 - 1.458 based on measurements from factory ammo. I'm loading for two different rifles so I like to size to near factory dimensions even if it means I only load a case 3-4 times. Also to account for the sizing variation across different headstamps.
Magelk
08-23-13, 19:55
Take a look at the primer and see if it appears normal. If it was way hot, the primer will be flattened which then would be a factor in the split. If not, then what someone said about it just being a reject case. Shit happens.
Colt guy
08-24-13, 20:24
I too have seen LC brass split like that, but it was not a batch wide

problem and I only split 4 or 5 out of 1000. I continued using the brass

and have several more firings and have not had any more problems.