After I got the Nikon, I realized that it wouldn't work with my current rings. I bought a pair on ebay...OOPS! Didn't pay enough attention and got rings for a #1 not a M77MkII. Couldn't find any on ebay that weren't going for almost full price. I ended up ordering a set of high rings from Ruger. Why are their rings so ecpensive? Cost me $85 with shipping! As soon as they get here, I'll get the scope mounted and head to the range. Hopefully this will take care of the pattern vs. group issue. I know this gun can shoot fair groups as I've done it before. It usually shoots an inch or slightly more at 100 with cheap 150gr CoreLokts. I'm going to try some better ammo and maybe a trigger job to see if I can tighten the groups up some.