I realize that this subject has been done ad nauseam, but I just wanted to ask if any of you have ever shot a grizzly, with the bear either in undisturbed or menacing state (i.e. charging or about to attack mode) using a .30-'06 or .300 Winchester Magnum? What loads were used and how well did they perform? I am sometimes in the bush on the eastern slopes of the Rockies in ranching country, and these are the two rifles I have and am comfortable with. I'm thinking particularly of the Federal High Energy 180-grain TBBC for the .300, which has a muzzle energy rating of 3841 ft-lb., only 76 ft-lb short of the 225-grain .338 WM at 3917 ft-lb. Another possibility for the .300 is the Remington Safari Swift A-Frame 200-grain load, which has a muzzle energy of 3544 ft-lb. I'm not a hunter, and so want to evaluate my equipment in the light of the experiences of those who have actually been there. It seems that many of the gun writers insist on big magnums, but many older ranchers have also successfully used lesser calibres. I like the .300 as an all-around rifle for Alberta and wonder if it would do in a crunch. All info appreciated!