Ok this is where I need some help, I paid 10 dollars for a 458 swaging tool to size cast 458 for 45-70 etc.
It did not have instructions so before I start using brute force I thought I would ask kindly for some info.
The hardened steel top punch fits nicely into the top of the part marked 457.
The 45C part is more of a mystery.
Thank you , Ray