The pin protrusion has nothing to due with cratering-blanking primers, its a result of the pin to pin hole fit, the tip profile, insufficient spring tension to support the indentation, the primer cup or a combination of them.
Sharpshooter has (tried?) educated us a few dozen times why less equals more where pin protrusion is concerned.
You, I or anyone else will ever indent a primer more than about .020", the anvil stops the pin forward at that protrusion length regardless if it set longer on the bench.
A firing pin isn't instantly accelerated to X velocity by the spring, it ramps the pin up in speed. Anything that reduces it fall length or restricts it's fall also reduces it's impact energy, that E=M*V thing. Round numbers, with pin set to .060" protrusion the pin fall length is shortened .040" when it strikes a primer whereas one set to .030"-.035" its fall length is only reduced .010-.015" allowing more time for the pin to accelerate thus increasing it's impact energy.
Bill
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