Hey Lenny,Hi ,I Just mounted a new Leupold VX5 in 3X to 15 X with a 30mm main tube and lighted reticle, Zero Stop. on my Weatherby Ultra-Light , in 270 Win. Its on Leupold Standard Steel Bases and Medium 30mm Steel Leupold Rings. Sighted it on Monday at 100 yds and tomorrow will shoot it at 300 yds . So far so good!!