Well short story, not really proud of but turned out ok. Killed an elk over 400 yards with 30-06. Had practiced extensively at range at 275 yards. and was confident at this range. I ranged an elk at 287 yards and got a good sitting rest. shot and missed, shot again, he started moving, shot again and he went down. I tried ranging again because i couldn't believe i missed. The 400 yardage pro wouldn't range him, but a tree between us and close to line of sight ranged at 287. OOPS I guess I ranged the tree accidently. I would never have taken the shot had I known he was that far because I had not practiced at that distance. Fortunately for the elk and me I didn't just injure him. I suggest just be real sure of the conditions and situation when firing that far or any shot for that matter.