Paid $13k for a once-in-a-lifetime trip for elk, mule deer, and antelope this past October in CO. Was supposed to go to a long distance shooting range (MO) to shoot for the day to make sure everything was good to go. Arrived there and was told it was closed for a group event. After much whining on my part, they at least let me make sure my gun was good out to 600 yards (had issues with it the last time I was out there). I arrived w/ the outfitter and checked my gun at 200 yards and was a little high, but the outfitter said not to adjust my turret (against my better judgement, I left it alone). While hunting for antelope, the first animal we put a stalk on was ~600 yards, so I turned my turret to account for this distance. No shot, so I turned it back to 0, but it didn't feel right. We then saw a B&C antelope so we put a stalk on it. After taking 5 shots on this thing and completely missing over its back, I couldn't figure out why I was missing so bad. Was I really that jittery??? We went back to the truck with my head down and tried to find another antelope. Thankfully, we found another decent one (not B&C, but still really nice). He was at 450 yards, so I went to change the turret and it came off in my hand... When I did the adjustment from 600 yards back to my zero after the first stalk, the turret was just spinning and not actually changing the elevation (verified this on a range later that day -- thank God for the gun club in Craig CO who does sight in days during the weekends before rifle seasons!!). Thankfully, the outfitter kept another gun in his truck (he said to leave my second one back at the lodge) and I nailed him at 410 yards!