RE: Davide Pedersoli rifle
Since it is a 50, the advice I gave you about bullet weight will only aply if you try shooting sabots with 45cal pistol bullets. Recoil will vary with your charge and bullet weight. Round balls won't kick much, put in a heavy conical and your max charge you will tend to feel it. Traditional styled rifles stocks have quite a bit of drop to them. This can make recoil forces lift the barrel up instead of staight back. This can make the stock slap your head. Been there, done that.