Iv gone thru 2 vortex viper lht scopes there complete trash iv bought 2 leupold vx5hd 3-15 scopes to replace them and im impressed 1 is on a 6.5 prc the other is on a 8 pound 338 edge aka 300 ultra mag necked to 338 shooting 280 barns lrx at 2780 fps