That CVA mountain Rifle has the hooked butt plate, designed to be shot off the upper arm, between the bicep and the Shoulder joint. Those steel plates give a nasty bite to the arm in recoil, particularly if you are using a gun that is larger than .45 caliber, and using heavy charges of powder.
Using FFFg powder gives a faster "Kick" than if you use a comparable load( one that gives you the same velocity as you got with the 3Fg powder charge you used)of FFg powder. Using Swiss powder adds to the recoil, and using any of the substitute powder causes MORE felt recoil.
Now, switch from a 180 grain RB to a 250 grain bullet, and you have added considerably to the felt recoil for no real advantage. That lead ball will pass through most deer, and it expands so much quicker and better than any bullet will that it is the far superior projectile to choose for deer hunting in that caliber.
I would not do that to any new shooter, or teen, no matter how big he is, until he FIRST learns how to hold that rifle properly, and then works up to a charge with that heavy bullet.
Your .30-06 is designed to be mounted to the Pocket of your shoulder, not out on the upper arm, where there simply is not much padding.
That .45 pistol is an early design that just happens to fit most hands, and has the hand up high so that recoil is straight back into the MEAT of the thumb, rather than into the thin web of the hand. Browning may never heard the term, " Ergodynamic", but he did it right when he designed the 1911 model Colt pistol.
That CVA was not made to allow a lot of recoil where the butt plate has to be placed. You can remove the plate, square off the butt,and put a recoil pad on the gun so that it CAN BE fired from the pocket in the shoulder. THEN, you can load that gun up with as much lead and powder as you think safe, and handle the felt recoil without bruising.
Most .50 caliber rifles, will shoot between 55 and 80 grains of FFFg powder accurately, using a Patched round Ball. You don't need any more powder than that, and you don't need a heavier bullet than that to kill most deer sized game. I recommend the use of conicals for hunting Bear, and Wild boar, if body shots are expected. For Deer, and even Elk, or Moose, or Caribou, that .50 caliber RB is superior, IMHO. :surrender: :thumbsup: