Re: Browning A-bolt : Trigger pull, no Bang!
The crudest part of a loaded cartridge is the priming system. It is required to perform one function, that is to detonate the primer and begin the burn process of the powder charge. Either it works or it doesn't. I never ever uniform primer pocket depths. Deeper is not better, deeper can cause problems. This may be the case here if they have been cut deeper. Uniform depth has never been shown to help accuracy. Helps with the head game but doesn't show up on the target. First the primer has to be sensitized and that is done by crushing the primer in the bottom of the primer pocket. This seats the anvil against the priming compound so that when the firing pin strikes the cup the indention can reach the anvil setting off the priming compound. Seating the primers too shallow will not sensitize them. Seat them hard. I like to feel them bottom out,anvil touching, then go a little further pushing the cup to the bottom of the pocket. That's the way they are designed to work. What kind of priming tool are you using and what kind of primer? If you're using one of primers for a 5.56 with a thicker cup that might also be part of your problem. Tolerances do stack up, depth of the pocket, headspace, firing pin protrusion etc but I'll bet either you're not seating them hard enough or the pockets are too deep. Shape and diameter of the firing pin is another discussion by itself.
