If you AR is over gassed, can it cause you to have flattened primers, even with mid-mild loads?
JTD
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If you AR is over gassed, can it cause you to have flattened primers, even with mid-mild loads?
JTD
With mine it was ejecting brass at the 1 o'clock position. Went with a H3 buffer and that solved the problem. Didn't have issues with primers flattening.
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My 308 is also ejecting at 1 o’clock, and every round I’ve loaded for it has had flattened primers. 5 different powders with 4 or 5 different charge weights for each.
JTD
What primers? I’ve seen some primers that flatten no matter what. Soft cups. Everything I’ve heard about AR10s is that they’re finicky. You try an adjustable gas block? Pics of your brass?
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CCI 400 large rifle primers. The brass looks fine, is not beat up. No pressure signs. No extractor or ejector marks. Just flattened primers.
JTD
Nothing wrong with those. Try an adjustable gas block or a heavier buffer.Originally Posted by JeffreyDeGraff
CCI 400 large rifle primers. The brass looks fine, is not beat up. No pressure signs. No extractor or ejector marks. Just flattened primers.
JTD
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They are flatter than they appear in the picture, but there is no cratering at all.
JTD
Those look like my primers in my 308. From my experience the CCI do that and look exactly like that. Both 223 and 308
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My 223 and 6.5grendel use CCI primers and they don’t flatten like that. I figured they were fine, the loads have all been well below max. I had just been thinking and wondering if being overgassed could somehow cause this.
JTD
I gotcha. I look for ejector swipes and burs from the extractor as far as pressure signs go. Like Cody suggested before, heavier buffer and/or adjustable gas block should solve the over gas issue. Keep us posted!
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