ruger accuracy

[jl1966]

I recently aquired a M77 in .22-250, it is stainless with a synthetic stock. Group size with a couple of different types of ammo is not all that impressive. Average group size is 3-4 inches, well centered, but not what I am looking for in a varmint gun. I am a ruger fan and have two other M77 rifles that I love, and yes I have heard the " Rugers are junk" line so please spare me that. I have read different theories about the method of tightening the two trigger guard screws and the bedding screw on this rifle and am going to try this first. Does any one here have any input on this or anything else I could try, short of major work like glass bedding and such. a rifle that wont shoot is a rifle that wont shoot, and I am not going to throw good money at it, not with plenty of other good rifles out there.
Thanks,
J.L.