My Remington 514 had a no name 3/4" scope on it when I received it, used, in 1967. Hard to tell how many bricks of ammo have gone thru it. While I "respected" it, it got used. It got bumped. It got handled. My son also used it growing up. Scope seldom needed much adjustment that I can recall. Then, one day about 10 years ago, I picked it up, and the "cross" hairs were an "X"... Who knows...