Keeping in mind that I haven't even been to Africa and have only played footsy with a couple Brown Bear...

I wouldn't enjoy shooting DG from longe range but, more importantly, long range shooting at DG could put my PH and trackers, not to mention myself, in greater...eventual...danger. It would simply be more likely we'd have a pucker-filled follow-up on a not quite stiff animal. I'd be far more convinced a killing/stopping shot at 25 yds than at 200 yds.