How much firing pin protrusion is safe to have?
I just bought a CZ 550 and when holding the bolt up in my hand, measuring with the rear end of a caliper I get roughly .065" from the bolt face. However when resting the bolt on its bolt sleeve/shroud against the table, the pin protrudes further and this number goes up by .02(~0.085).
How does one go about adjusting the firing pin protrusion on a 550 (if at all necessary or possible)? I notice that there is a firing pin spring nut that can be shifted fore and aft, is that supposed to do anything?
I just bought a CZ 550 and when holding the bolt up in my hand, measuring with the rear end of a caliper I get roughly .065" from the bolt face. However when resting the bolt on its bolt sleeve/shroud against the table, the pin protrudes further and this number goes up by .02(~0.085).
How does one go about adjusting the firing pin protrusion on a 550 (if at all necessary or possible)? I notice that there is a firing pin spring nut that can be shifted fore and aft, is that supposed to do anything?