On target with nice grouping in 4 shots - Vortex Viper PA 6.5-20x50mm Rifle Scope, 30mm Tube, Second Focal Plane

I recently purchased the Vortex Viper 6.5-20x50 PA Matte Riflescope to replace another brand. I would shoot the old scope and it would not be on target for any shot after the first one. I tried bore scoping the rifle, realigning the scope until it failed completely. I couldn't hit the side of a barn at 100 yds. I mounted the Vortex last week and took it out. It preformed perfect. I bore sited it and after 4 shots I was hitting a nice grouping. I am very happy with the Vortex and will definitely purchase another for my other rifle when it arrives.