I always bought the old Redfield's until they went belly up.Then I switched to Leupolds. Never had a problem with my Leupolds until last hunting season with any of them.Last season three times I sighted it in,get a shot and just flat out miss.I'd go recheck it and it would be way off again. It made a trip back to Leupold,no questions asked. Supposedly repaired it,which I have tried it yet.The scope was gone close to a month.The ones I have aren't their top of the line models. Vari XII's and one VXII.