drill a big hole under the butt plate and pour in a hat full of lead shot.
It makes the gun a bit butt heavy but will dampen recoil.
Or use the feather lite loads, or start shooting a 28 gauge.
Or Cowboy Up and take the licking
Yr' Obt' Svt'
Bunk
suggesting 28 gauge is just plain mean.

I said 16 earlier. That should do it.
It's not called sweet 16 for nuffin'.
