It might not be the scope at all. I worked on a Benjamin, about a a year and a half ago, and it had a very poor stock fit and it used plastic bushings on the barrel screw. I took out the material and got the stock bedded correctly and did the brass barrel bushing mod that I read about on GTA. It is easy to do with just a drill, no lathe or milling machine needed. Anyways, the gun went from shooting a 3" group,at 20 yards, to under dime sized groups. Unless you had this gun shooting better with a different scope before, I wouldn't limit myself to looking at the scope unless it is the scope that they sell with their guns; they are really bad. You didn't mention what you bought for a scope either, so it is possibly a contributing factor but might not be the only one. They are worth working on, once you find the problem, they are pretty good guns.