At 1200 FPS and 400 grains it is a real hammer and all that is needed. Weight is a constant and velocity always diminishes. Momentum imparted is what BIG Bore revolvers are all about.
All that is needed for what? I have found that a 400 + grain bullet at 1,400 fps is more of what is needed on bigger critters, LOL!
All joking aside, as long as the bullet is up to the task, velocity is your friend.
