Handgun Hunting Discussion

I had an 'interesting' discussion this past weekend regarding elk and caliber choice. I'm curious what y'all's thoughts are as experienced hand gunners. Here's the scenario...bull elk on public land out to 150 yards using jacketed bullets...what is your minimum caliber for a straight-walled handgun round?

My answer is/was .454 Casull.

BTW, I tried to create a poll but the site only let me have 2 choices.