What bullet and load combination would you carry in a .44 Mag pistol as backup in bear country and why? Here a couple I've been looking closely at:
Hornady - .44 CAL 300 GR HP/XTP (not a partitioned bullet) Hornady sells these Muzzle Velocity: 1150 fps
Muzzle Energy: 881 ft. lbs.

Winchester - .44 CAL 250 GR Partition Gold® (partitioned controlled expansion and bullet weight retention) Velocity in Feet Per Second (fps)
Muzzle 1230 FPS
50 1132 "
100 1057 "
Energy in Foot Pounds (ft-lbs.)
Muzzle 840
50711
100 620

Thoughts I have. Hornady 300 gr bullet is 20% weight; however, it's not partitioned or specifically designed for weight retention upon hitting heavy boned heavy game. Or at least I don't see them speak in those terms. It's actually slightly less "energy" than the Winchester Partition Gold 250 gr factory rounds. Hornady is a well respected name in ammuntion though without a doubt.

Winchester Partition Gold 250 gr is design for controlled "pettle" expantion and bullet weight retention. Both of which I've read it does well. Question I have: Is 250 gr. bullet a substantial enough bullet at say 50 yds or less in .44 Mag handgun as a backup weapon in bear (black and Grizzly) country.
Why or why not you'd use either or another combination, if you were the person depending upon it stopping a bear?