500 grains,
It can't be worse than my 12" 460 weatherby. The 600 has another 800 ft.lbs of energy, but it weighs 7 1/2 lbs instead of 4 lbs. When my 460 stayed together on the last 2 shots, it was possible to do but it was ferocious recoil, but doable. This is just a gun to have and shoot a little. Not a practical hunting gun at all.