I've only shot one bear with a .25, that one was with a Roberts. It worked very well with 120 gr. Nosler partition - broke shoulder blade, backbone, and exited from just over 100 yds. I have used the 250 Savage with 117 gr. Hornady round nose to kill three big northern whitetails, and got an exit wound each time. I'd be OK using either bullet on black bear in a .250 if it was loaded hot ( about 2700 fps) and shot at ranges under 150 yards or so. Longer range would make me nervous about bullet placement as well as bullet energy. I'd not use a Remington or Winchester factory load 100 grain bullet for bear, for reasons some others have already mentioned.
