I try to practice for it and, like stated previously, set myself in spots for it. I have shot a couple animals over 1000, one quite a bit further than, but secretly hope to get within 500. That way I feel my hit probablility is really high in most any condition. If the conditions are right then I won't hesitate on pulling the trigger on one twice that range. This year might be different, I have gotten out of my groove and haven't shot nearly as often as I should be. I also still don't have my ELR rig lined out. I shot it out to 1200 last week and was not too happy with my results. The gun was shooting great, it was all me. Bad wind, horrible mirage, and an unexperienced spotter sure didn't help so I called the ball and didn't want to waist any more rounds.
I am 2 for 2 on bull elk while hunting public land in Colorado. I contribute both of those to being able to be accurate at long ranges. I have a buddy that goes every year and last year passed on a large bull at what he said must have been 400 yards. While he didn't feel confortable with that range, I wish I could get one in that close!