[Austin W Hogan]

Richard; One is broken and one isn't. I would imagine the broken and jammed firing pin was one of the reasons this gun had been broken up and sold for parts.
I didn't measure the firing pin angle while I had the pins out, but it appears to be about 15 degrees. That provides prettty good leverage against a spherical tip.
My own experience is that my Parker hammer gun that pierces primers opens more easily than my Fox.
Best, Austin