I had a friend bring a rifle over to sight in.The rifle shot high and the elevation adjustment had been ruined trying to get it to turn some more.I took the scope off and found that somebody had shimmed the back of the scope.Anyhow ,I threw the scope in the trash and installed one I had laying around.A day or two later it occured to me to send it back to Simmons.Felt bad about it knowing some moron had broke it.They probably cussed me when they saw it but they sent a new better scope.Can't beat that.