No, I mean specifically 5 cases of primers that have blown back into the upper and getting into the carrier key. In all the cases that I examined the ammo was either M855 or M193. All the chambers that I checked were in fact not up to 5.56 specs.
Quote:
Originally Posted by Gene Econ
Iraqgunz:
You have only seen five cases of blown primers in AR's? He, he, he. I have seen guys shoot rapid fire strings and blow several primers in one string. And it wasn't because they were shooting 5.56 through .223 chambers and jammed the bullets into the rifling, thus causing a pressure spike.
It was because they thought they were getting over by getting another twenty fps out of a already too hot load, fired on a more than average hot day, after their ammo sat in the sun for a few hours and cooked.
I don't take blown primers as easily as some guys. It means the guy either made a mistake in his handloading or took an unnecessary risk to win a match.
That said, I can't recall one experience with Lake City 5.56 blowing a primer in an issued service rifle or carbine. Crimped primers do work.
Gene
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