I have a 7 year old nephew who wants to shoot one of my ML's. I really want to try to not to go out and buy some new bullets just for me to shoot.

what bullets I have on hand:
.430 216gr swc (home cast)
223gr buffelo bullet
round balls (no loads worked up yet)
.452 230gr seirra sports kings HP
.452 250gr xtp
.429 240gr xtp
all others are over 300gr

powders
pyrodex p
pyro rs
triple 7

could be a good excuse for me to pick up some goex

little help on this, I don't want the poor boy to end up one his ass