Smacking any beast on earth with 600 grains of hardened round ball at 1500 - 1800 feet per second is definitley in the stopping power league.... We are talking around 4400 foot pounds of energy!

Ben I am not sure I understand what you are asking us to specifically comment on. Are you asking us to chime in on whether or not we feel the 12 bore is or is not a gun that CAN BE USED for stopping big and dangerous game?

On the other aspect of all this---I shoot 140 grains of BP now under some heavy balls, but 270 seems to be beyond my tolerance on the recoil end.