11-27-2011, 06:57 PM
mac37 Wrote:LR55,
I think you got it. It makes sense that the chamber is cut too deep. The Lapua case is set too deep in the chamber not only for the firing pin to reach but even for the extractor to pick up. As for the necks, all the fired cases measure between .298 and .300. So, it seems that the throat is .300 and the chamber is cut ~.008-.010 too deep. Could the AA bolt in an LBC chamber contribute to this? I read AA uses their own spec bolt and they will not work with other mfg's barrels and correctly headspace.
Thanks for all the help!
That's a dangerous gun. Did you buy it new from the manufacturer? If so send it back for a replacement. If they don't believe the problem and you want to confirm it, you can get a set of "go/no go" gauges. Midway sells them but they are out of stock there til the end of December: http://www.midwayusa.com/product/316994/...64-lbc--ar
Somebody else may have them in stock.
Whoever you bought it from sold you a defective gun, so you should be able to get your money back.
RR