.58 caliber that is. I know I have some .575" balls waiting for me at the post office along with a T/C Renegade courtesy of one of our dear fellow forum members and a .58 cal GM barrel from Long Rifle shooting supply. But just in case the .575"s don't shoot well, I picked up a box of .570" Speer balls. Not too many places carry these thing so I figured I better grab a box and see which shoot better - the .570s or the .575s.
I just can't wait to get home and play with my new toys.