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same scope and rings I have on my M77 MkII .243, and the lowest rings possible. Sounds like you have the rifle tuned perfectly as far as screw torque. I bought mine the same way... like new, but no box, papers....just rifle. I spent several trips at the range in disgust with 2-3 inch groups (100 yds), then discovered on another web site that the M77 requires a "white knuckle" torque (actually I think rated at 90 inch pounds) on the front diagonal action screw and "hand tight" on the rear screw (about 30 inch pounds). Not having a torque driver that would hit the call for the front, I got the stoutest screwdriver I could find that fit the slot, and white knuckled the diagonal screw (in Boyds Laminate free float stock). Surprise, surprise... sub moa groups with every kind of American factory ammo doown the tube, and like yours, some would cover with a quarter. I recently had a buddy leave a Hogue stock with me to try out, and the first range trip was a bummer like the early experiences.... haven't got to the "white knuckle" adjustment yet. I do love the Ruger M77 line.

Congrats on the fine tuning job.


surv