Sabotloader and myself were going back and forth on my mountaineer BP because my bolt would not close completely. I kept reducing the length of the primer stack .002" or so at a time and still wouldn't close when I took .017" off it. I didn't want to risk removing any more material from it. After another discussion and Mike telling me he removed .020" from the BP face, I took off a little at a time until my bolt closed fully. Measurements showed I removed .014" off the BP face.