Cayugad, see if this helps. Ii do not have that gun but these guys have loads and are using the same bullets. Just by chance when you use the scope is it mounted high or low? I have my guns set up for high mounts with the ability to use open if needed.I have forgot about adjusting my cheek placement on the stock and have noticed big diffrences.

http://www.thefiringline.com/forums/showthread.php?t=221512