Willoughby: Point of clarification to your last post:
I would suggest that you have to take the bolt apart to SET firing pin protrusion, but you shouldn't (well, I suppose you could, under ideal circumstances, but let's not get into that) MEASURE firing pin protrusion without reassembling the bolt.

I'm sorry if this sounds nit-picky, but I am trying to be more precise. Does that make sense?