When my old man went on a guided sheep/caribou hun t in the territories 30 yrs ago he said the first spiel the outfitter gave them in camp was the " we dont plan on killing any bears on this trip but if the absolute need arises, no-body...and I repeat...no-body will shoot further than 45 yrds at a bear. His reasoning expained as, most every hunter can hit reasonably close to where you need to at 45 yrds even with panic/buck fever and a poorly hit bear will be one you before you get the second shot into him if he is 45-100 yrds from you...less that 45 yrds, your on your own because I'm gonna do what I need to do to survive...end of story.