Alleycat,
Powder bridging is a plausible explanation at this point. I was using a progressive loader and did not visually check (shame on me) the powder level in each and every case for small rifle ammo. I do this now, of course. Weighing the completed cartridge is a great idea.
I have to check how much H110 would fit into the case without the relatively long bullet bottoming out. When I seat bullets, I do not just yank the lever down but feel what is going on.
On a bright note. This event has given me more confidence in the safety of the AR platform, having "grown up" around Mauser K98 actions.
Last edited by alpine44; 12-07-2009 at 05:38 PM.
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