I'm getting a little bored being confined to my house over the Covid-19 situation so I thought I would start this thread. What hits harder, a .416 Rigby firing a 400 grain bullet or a .458 Win Mag firing a 500 grain bullet? Both develop about the same muzzle energy, somewhere around 5,000 lb./ft. Momentum (muzzle velocity in fps x bullet weight in grains/1,000) however favours the .458 Win Mag. Interesting question. Which do you think is more effective at point blank range if both are using premium bullets?