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Posted: 6/8/2015 7:53:44 PM EDT
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So there I was at the range today, plinking when I had a weird case separation. The round sounded normal, and exited the barrel fine; I discovered the problem when I noticed a double feed. The rear (base) portion of the case ejected while the forward portion remained halfway in the chamber, causing the next round to double feed. Has anybody seen a case separation like this? Each one I’ve seen before has been just the case head ripping off, usually on cheap import ammo.
The ammo I was shooting was Ultramax remanufactured 55gr 223, loaded in Lake City cases, part of the last 50 rounds from a case of 500 that ran flawlessly in two different carbines otherwise. I have the lot number if anyone is interested, but I bought the case in 2008-ish so most of it is probably used up. I was surprised to see a failure like this with Lake City brass, but I guess stranger things have happened. TL/DR; Anybody seen this happen before? 
What says the hive? |
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i stopped there. to be expected from ultracrap-happened before will happen again Quoted:
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The ammo I was shooting was Ultramax remanufactured 55gr 223, i stopped there. to be expected from ultracrap-happened before will happen again Meh, it was cheap when I bought it and one round failing out of 500 isn't bad for ammo I was shooting at bowling pins. |
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Common place for .223 / 5.56 cases to fail. It's roughly where the web of the case wall tapers. I dont know what Ultramax does wrong but none of my reloads or those of my shooting buddies have ever failed like that. I've reloaded bass and steel cases up to ten times without that kind of failure. They must be setting the shoulder too far back or something, causing excessive headspace.
1DD |
| What is your round count on the barrel and BCG? Excess headspace can cause that kind of separation. So could a reloaded case that had been originally fired in a rifle with excess headspace. Those cases often show a bright ring arould the area that has stretched to match the too large chamber, prior to the firing that produces the separation, but that would disappear if the case were tumble polished. |
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Quoted:
What is your round count on the barrel and BCG? Excess headspace can cause that kind of separation. So could a reloaded case that had been originally fired in a rifle with excess headspace. Those cases often show a bright ring arould the area that has stretched to match the too large chamber, prior to the firing that produces the separation, but that would disappear if the case were tumble polished. It was a new barrel/new bcg, with about 350 rounds through it at that point. I hadn't thought of headspace, but I don't think that was the issue. Thanks for the replies everyone, it just looked different from the other case failures I've seen. Makes me feel better that it wasn't out of the ordinary...maybe I just need to shoot more. 
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