I got this one yesterday from PA .This was my second try with these scopes . The first one wouldn't focus at 10 yards and was a bear to turn anything on it. This one looked different. The elevation knob was without cover and clicked nicely and can be rezeroed . The windage has a cover and is a nice finger adjustable semi-target knob , Looking through it I had to adjust the rear focus a couple of turns to get the image in focus , but I was able to get both the crosshairs and image into focus at the same time . I put the Hawke on my R9 that had been wearing an old workhorse Barska airgun scope . Sight-in went OK; and soon I was marking the front objective on a piece of tape, I put on it for actual yardages . Past 35 yards I found it was hard to focus at the same point each time , to enable the Hawke to be useful in field target ranging. As I was attempting to shoot a Gamo knock down target out at 50 yrds , something happened ; my poi changed ; I started hitting high and left . The R9 had dieseled a couple of times so , I cleaned the rifle and started shooting dots at 30 yrds . Maybe I should say, trying to shoot dots . I would dial in my POI and after maybe 6-8 shots , my POI would change . Thinking It couldn't be the scope , after all everybody loves the Hawke scopes and they are made specifically for airguns . so; I actually tore down my R9 cleaned out the lube , relubed and installed the tophat , I had removed last week . After putting it all back together , I sighted in and started shooting dots again at 30 yards . Nope , nothing changed , My POI was still moving around on me . I put the rifle up for the evening and got it back out this morning to try again . I dial in at 30 yards and after about 10 shots all inside the dot , my next 3 were and inch to the left and a little high . DANG IT !!!!! I have the worst luck with scopes and springers , and I don't even own a magnum springer . I called PA for A RMA number to return the scope for a refund and Lisa was very nice about the whole deal and even sent me a paid return label for the scope. Kudos to PA . BTW I put my old Barska back on , 6 clicks of elevation and I was back on at 30 yards and knocking them out with the consistency iIhad before. The Hawkes may work for some , but IMO unless you go highend with scopes, IMO they are all a hit or miss deal . kirby