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The bolt was 100% closed when the charge ignited. I let the BC slam home, pointed the gun away from me, and pulled the trigger. Also, I spent about 30 minutes to get the bolt open after the ka-boom. It needed a lot of lube to enable the bolt to turn together with the case. The bolt could not turn relative to the case because of the severe extrusion of brass into the ejector hole and into the extractor gap. The extrusion of brass into the ejector is another indication that the bolt was closed.
I agree with the posters that doubt real bridging on such a fine powder. But, I use the Lee universal powder die that has two brass bushings inside. These could cause trouble. Powder could get between them.
Putting 15gr on top of 14gr is impossible. Not enough space in case.
Last edited by alpine44; 12-07-2009 at 10:24 PM.
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