Well whether the .45 will kick less I am not sure since I do not shoot one. I personally would get a .50 caliber and load it light. Maybe 80 grains of powder and a 200 grain Shockwave or XTP and that should be a 75 yard rifle. The other alternative is a traditional rifle in .50 caliber with 70 grains of powder and a patched roundball. This might be the extent of this load, but it would not have much recoil at all.