Well, I just started casting for my 45-70 marlin.
I bought one lee mould and now im not sure if I bought the right one.
Its written on the box: 457 diameter weight 340 grain.
457-340-F double cavity.
After I casted a few I measured the diameter and it ranged between 452 to 456.
Im thinking that might be too small a diameter for my rifle.
I rather go larger than small to prevent gas cutting.
Am I missing something? Would this mould work for a 45-70?