What should Firing pin protrusion measure?
You need to get assistance from a qualified gunsmith.
go 0.064" no-go 0.071" Also, check firing pin protrusion from bolt face.
Yes the firing pin should float freely on top of the breech bolt. If you take the gun down (seperate the receiver) the firing pin will be visible, and should slide freely backa and forth.
Find a good gunsmith or machinist
A firing pin that is mounted on/in a hammer
There are several possible causes for the failure to fire. When this happens, inspect the cartridge. If there is a strong indentation which should have ignited the primer, then change ammunition. Also, inspect the chamber area where the firing pin lands. If there is a large indentation at the rim of the chamber which could be caused by dry firing, then the cartridge is not properly supported and the firing pin is not crushing the rim of the cartridge, setting off the primng compound. Correcting this problem requires replacing the metal at the rim of the chamber and there are a couple of methods to do this. If there is no indentation or only a light one, inspect the firing pin for damage and proper protrusion. The tip may be broken or the firing pin may not be moving freely in its well. Clean and repair as necessary. The hammer spring may be weak and not striking the firing pin with sufficient force. Check it last.
Firing Pin Block
Firing pin is held in the falling block by a retaining pin. This is not normally removed or replaced for routine maintenance. Rather than provide instructions, I will suggest that this go to a gunsmith, who should also inspect the firearm for safe condition prior to installing the firing pin.
Like it says, the firing pin rotates as the action cycles.
By action of the hammer striking the firing pin, forcing it into the primer.
Firing pin is what strikes the back end of bullet igniting propellant
Try e-gunparts.com