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Thread: Dented case necks ...
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23 September 2014, 11:31 #16Member
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23 September 2014, 11:46 #17
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23 September 2014, 13:54 #18
Interesting. I wonder if it was ejected with a little less force if that would prevent it from flipping all the way around to hit the deflector.
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23 September 2014, 16:12 #19
That will come right out after being run through a sizing die and looks completely normal as far as I can tell. Probably caused by hitting the shell deflector as it is a flat indentation on the case mouth.
Probably likely because of the shorter case length on the 300BLK casing. You're using the same upper design for a shorter shell casing, so where a 5.56 would bounce of somewhere on the shoulder or just before it, the 300BLK hits on the mouth as its a shorter case.Last edited by velocity2006; 23 September 2014 at 16:16.
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23 September 2014, 17:48 #20
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23 September 2014, 18:13 #21New Member
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I would assume that fiddling with the ejector/ejector spring could reduce how much the 300aac case rotates, so that the case could rotate more similarly to the 5.56, but that would surely lead to overly weak extraction in fouled rifles. The easy solution to the dents is probably just to glue a piece of rubber onto the brass deflector. Or use a slickside upper.
I am glad to discover I'm not the only one with the issue. I had figure it was just because I was using a billet Seekins upper with a unique profile on the brass deflector.
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23 September 2014, 19:31 #22
That's what I was thinking - fiddle with the ejector spring in the bolt. I'm not sure anyone would want to glue anything to their upper receiver though possibly just a dab of black silicone could be laid on since it would come off easy enough. If they are only as severe as that picture though then it shouldn't be an issue for reloading and that's what I had started thinking about.
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24 September 2014, 10:43 #23
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13 November 2014, 17:38 #24
It isn't a problem. Don't overthink it.
"Never forget those who have died; Never forget who killed them."
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2 December 2014, 11:48 #25Contributing Member
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