I put about 100 shots through the Hawke SR. Im not convinced about the speed selector. All it seems to do is change the focus of the scope just like the Barnett scope does. Also i couldnt figure out how to use their software as i downloaded the graph and was just confused with all the options. I did have it adjusted to 3.6 as you mentioned. When mounted with the 1" rings that the Barnett scope comes with the center of the scope is actually 2 3/8" above the rail, not sure if that matters though. With both the stock Barnett scope as well as the Hawke scope i dont think they are holding their zero as far as elevation is concerned. Im going to test this theory more before i can confirm, but an article i read on opticsplanet mentioned this exact issue regarding the more "economical" scopes. It said they have to be shot multiple times or you can tap on them to settle in the reticle after each adjustment. I tell ya, its always something lol.