I had Ruger rings on my 416 Rem Mag (NO. ONE) with one of the old Redfiel 2x7 Tracker scopes on it. I quess I had 1800 rounds through that gun without the scope ever moving. I have had that Redfield scope on about 25 rifles and still use it today on mt Bwoning A-Bolt 308. I trade a lot of guns but never part with a good scope. I have a World Class Tasco 4X scope that I have had on just as many guns. Those OLD Tasco world Class straight power scopes were tough as hell and way ahead of their time. I sold about a hundred of those in 6X while I had my gun shop. Never had a bad one come back.