as far as your problem goes, it sounds like the bolt is just slipping off of the sear.
check to make shure that there is no lubricant on face of sear, if there is clean with alchohol
check to make shure your sear is sharp and not chiped
check to make sure you bolt edge that catches the sear is not worn
check to make shure you have enough effictive length of the sear engaging the bolt (usually this is caused by the trigger rod set so that its final resting place would be past where the frame stops its travel, having the sear partilally up is the result of this). you can check this by just looking at the edge of the sear that catchec the bolt, you will notice a little discololation of the part that catches the sear, i don't know the length that should catch it, but that might be another thread all together.
check to make shure that there is no lubricant on face of sear, if there is clean with alchohol
check to make shure your sear is sharp and not chiped
check to make sure you bolt edge that catches the sear is not worn
check to make shure you have enough effictive length of the sear engaging the bolt (usually this is caused by the trigger rod set so that its final resting place would be past where the frame stops its travel, having the sear partilally up is the result of this). you can check this by just looking at the edge of the sear that catchec the bolt, you will notice a little discololation of the part that catches the sear, i don't know the length that should catch it, but that might be another thread all together.
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