I was using handloaded .308 diameter 150 grain Combined Technology Partition Golds at about 2300 FPS which allows me to maintain 1000 foot pounds of energy out to about 225 - 250 yards. Plenty of range for PA whitetail conditions. No photos, but the deer died.

I really don't think you will have any problems, although I know nothing about how well brown bear expands or does not expand. Regardless, if you hit the deer in the "boiler room" you should put it down.