I use a ML for the kids, because a 20 ga slug gun would turn them off quick.
I use a 175 gr "Dead Center" bullet from Precision Rifle. I load it on 60 gr powder for practice, hardly any kick.
Then for hunting I use a 250gr Ultimate (Precision Rifle) on 80 gr powder, hits the same out to 100 yards, and they never notice the differance.
SLack