The firing pin protrusion should be checked it the "fired" position not while it's cocked.
When the firing pin is extended fully, it should touch the top of the notch that is labeled 75, this is the minimum. It should not touch the top of the notch that is labeled 95, if it touches there then the firing pin sticks out too far and can put a hole in the primer case when fired, which will release hot gasses through it.
NRA Lifetime Member Since 1999
"I ask, sir, what is the militia? It is the whole people except for a few public officials." George Mason