I'm with you on protecting the dog just like he does you. But then again, I like my dog much better than most of the people I've met. Lets face it, that dog is family to you just like mine is to me. As to the gun, I also carry, both now and for the past 12 yrs or so, a "old" Ruger Vaquero when a heavy handgun might be beneficial, and never feel under gunned. Granted, I haven't had to use it against a grizzly, but have put down a charging full grown bull with it, and it was using a load almost identical to what you describe. One shot stop, entered the forehead, and stopped on the left hip bone. I dont know if that was a fluke as I only had to do it once, and always heard they had amazing penetration, but not sure i would have believed it if i hadn't seen it.