[RemTim]

2 balls in one chamber sounds like a great way to get rid of any balls which are too small. Just use the smaller ones for the first ball.
I have a few .440, and .451 balls that have a tendency to roll out of the chamber, so I will have to try this.
For that matter you could put anything behind the ball such as crushed glass etc, that would be cruel to shoot someone with crushed glass. An oldtimer once told me that if you wanted to really make someone suffer- take the shot out of a shotgun shell and fill it with crushed glass and shoot them with it........ I don't know of anyone I would wish that on.