I spend a fair amount of time in grizz country and their range continues to expand, My carry has always been a 44 mag S+W . but I continue to assess that .I watch a pod cast of a guide outfitter that has had several encounters with Grizz and blacks, He says the Best is a RIFLE of DG caliber how ever for pistol protection the best is the gun you have on you when charged ,you will have about 3 seconds ,so the gun setting on top of your cooler in your back pack or some where out of reach is usesless, also a good chance you will be shooing from on your back with the Bear on top of you if its a grizz. IM seriously considering switching too my 45 ACP, 3 shots to the ear, mouth ,throat are better than a one shot 44 to ...? a hard cast + p 230 gr. a close range might save me. would rather have a 44 mag 325. gr at 1600 fps but its a slower response time for me and time is everything under a charge . practice ,practice ,practice, and then practice. and always carry bear spray so you can douse them good after they are dead.