BIG! Sounds like the real deal! I dont believe you'll need the 500's:-laf! 'Course, if you just cant get enough of bein' beat up? Its ALL GOOD

Oo. !
Just practice with the lighter loads so the process is instinctive! Make sure you pad yer shoulders good:-laf! Shoot it left and right handed. In case you loose your strong side capability! Your Wife is a WISE WOMAN

! Sounds like your Nephew is smart, also

!
Makes a 12 Ga. with slugs look like a pellet gun

, dont itOo. ? GregH
PS. Gotta tell you a story on the Ruger #1, . 45/70;
Many years ago, I did some load development using the 400 Gr. Barnes semi-spitzer. It is an absolute MONSTER! Suprisingly accurate and just about as light a rifle as you would want to pack around. However, that rifle, in . 45/70, recoils like a 105MM Howitzer!!!
Upon returning from a session at the rifle range. I had to stop by a good Friends house to show him the Rifle and the loads. He lived in an unincorporated part of the Canyon, so he said, "Can I shoot it"? Now you have to understand. This man is in a wheel chair, paralyzed from the chest on down! He is former Navy and a fellow firearms enthusiast.
Bill rolled himself out on his back deck and locked his brakes on his chair. I went out by the edge of his property and tacked a target to a 18" diameter Ponderosa Pine about 30 yards from the deck. Bill loaded the round and set himself as steady as possible and fired. Things happened. Rocks flew from the hillside behind the tree and the recoil almost rolled Bill over backwards:--). His front tires, near his feet, came plum off the deck, where, had he not caught himself and lunged forward. He would have been flat on his back with a knot on his head:{! That round hit the target square on and completely penetrated that tree!