New rifle (10 fcp-sr). The accutrigger slips the sear and locks up 75% of the time. UNLESS, I loosen the action bolt in front of the trigger to 10 in/lbs. Won't lock up even when I slam the bolt at 10 in/lbs. Whatever is causing the problem goes away once I get down below 15 in/lbs on that action bolt. Something must be binding under tension. But what? And what do I do about it?