While this topic has popped up. I did as Roger suggested and got the 45 firing pin installed. Works great.
On the Pedersoli FB page someone complained of the same thing, (357 firing pin broke), so I put up Roger's answer and that I had mine done.
One of the comments was from Pedersoli folks themselves that gave it the thumbs up as best solution.
Again Roger, thank you, thank you!!!
PS I now mostly use the rifle for attempting to shoot little steel chickens, rams, turkeys and pigs. I was using 357 mag with TB and 125g bullets but one of the guys that is a lot better than I am suggested using a heavier bullet so going to go back to trying the Hunters supply 162g bullets.