OK, but what causes a floating diring pin to discharge a primer that is not fully seated vs. one that is fully seated? For example, if one were to seat a primer perfectly flush with the casehead and another slightly deeper. Why would the flush seated primer be more likely to discharge and not the bottomed-out primer. That proposition defies logic. Everyone knows that a primer which is fully seated to the bottom of the primer pocket is more reliable than one which is not. Why would a floating firing pin reverse that?