Never shot a grizzly. Big boars in Texas are as close as I come.
Shot lots of 44 mag since 18 yo. Bought ranch about 15 years ago. Hog country/thick brush. Somehow, 6 shots crawling through the brush after a wounded hog, deer, whatever, didn’t seem like enough. Too much recoil, not enough medicine pills. Glock 20 was my answer and I haven’t looked back. Lighter recoil, 15+1, and carries well on a belt.
I was in Yellowstone country some years back and took my son hiking. Was told we were in a high density bear area. I packed the G20. Never saw a bear but came upon some fresh scat. It was fresh as my finger told me when I stuck it in to test the temp. My son didn’t appreciate it later when I dove into the bag of Doritos! Anyways, never felt undergunned. I have been told its very hard to find a Glock 10mm in Alaska these days, but I dont’ know that first hand. I kinda like the statement of shooing him in the nose with 9mm. Practice, confidence, carry on.