Skeetx,
You won't get any argument from me for that. As a general rule, black powder rifles used lead bullets, bore sized or smaller, counting on black powder to bump them up. They needed space for black powder residue. Most of us prefer lead bullets around .002-003" over groove diameter, when using smokeless powder in black powder rifles. This creates a case where the preferred bullet to fit the barrel may not chamber. Of course people that don't mind using black powder in their old rifles can still use smaller bullets, counting on them to "slug up". My 43 Mauser M71 has .452" groove diameter, but won't chamber a cartridge with .452" bullet, unless I make it think it is a heeled bullet. With .446" "proper" bullets, it won't shoot, but with .452"(.454" won't fit seating die), it will. The lesson here is try "one", before you load an ammo can full.
Mike
