Semi,
I know you want to try out those minie bullets you cast, but why don't you try some RB's through it? Unless maybe you're gonna try both when you take it to the range. When I was in high school, a buddy of mine had a .58 Zouave that shot RB's better than it did minies. But then again, he wasn't the sharpest tool in the shed so knowing him, he probably had way too much powder behind them. He had "little man's syndrome" and always believed that more is better, bigger is better, etc.
BPS