Matt, if you want to know what they feel like to shoot just grab a slug gun some newer sabot rounds and go fire them off. Pretty much the same thing. 45 caliber 400 grn bullet moving at near 2000 fps. Recoil will be simular unless there is a large difference in the weight of the rifle. More weight = less recoil ususally.

If you don't like firing slug guns or magnum shotgun loads I wouldn't run out and get a 45-70. Of course some of the slower loads probably don't kick nearly as bad.

Paul