RE: Side arm vs. Grizzley
I don't think .45 acp is adequate. It's not sufficient velocity resultiing in less force needed to break through the heavy bones of even the skull of a grizzly bear.
.44 mag or .454 casull revolver. I've gone to carrying while hunting Elk inwestern WYa Ruger Redhawk .44 mag.with Corbon 300 or 320 gr. hard cast bullets as a backup sidearm. These cast bulletswon't blow apart when hitting solid bone. I hope never to have to use it, but we did see mtn. lion tracks 3/4 way up the ridges in the dark woods bordering the area we shot our Elk this year. So, one has to be alert and prepared. Stay safe.