I was going to purchase some roundballs today and they list two
different sizes for each of my guns. I have a 45. cal and a 54. cal
both of them are TC hawkens. They list a (440 dia.or 445 dia)for
the 45. cal, and (530 dia or 535 dia) for the 54. calibers. How can
I determine which roundball I'll need for either gun?

Thanks.