The Tasco Pro Class scopes were right at/near the top of the best ever made for the heaviest recoiling handcannons IMO, and whether they were fixed or variable power made no difference. I used them for many years on Contenders and a couple of years on Encores that were chambered for cartridges WAY past a 454 Casull in both recoil and torque, some WAY WAY past, and never had a single failure.