RE: is this really hunting?
If they are good enough to make ethical shots at this distance, as long as the conditions are right(safe), why not?? Bowhunters have been extending their range every season, whats the difference, other than the fact that they have probably a better efficiency at those ranges than most bowhunters do at the long range 40-50 yard shots.Don't get me wrong, I would give up my gun long before I would my bow, but why harp on them for making these shots with (80 %) accuracy.
For an amazing video of a LONG range rifle shot(couldn't get it to upload). Go to you tube and search "338 edge" and watch. In conclusion, my thought is "more power to 'em", so long as they are trained and have honed the skills enough to be efficient.