If the Ruger Doesn't Group Well
cmdc - If the Rugers don't group well there are certain things that can be "fussed with" pretty easily, and one that is common with the wood-stocked M77's.
My first Ruger was my tang safety .257 Roberts. Out of the box, its cold barrel shot was dead-on. Next shot was about 3" away, usually right and high. Third shot was left and high. I cursed and reloaded, to no avail. Then I ran a piece of paper under the barrel, about 5/8" behind the forend tip, and slid it back toward the receiver. It bound about 4" back from the forend tip, at 8 o'clock from the shooter's position. Removed the barreled action, sanded the high spot to clear by about .020", and done! -Sub 1/2moa.
Second was my wife's M77 mkII .243 ultralight. More binding on the forend, in 3 different places. Sanded it clear, and made a mod to the forend tip (Ruger mills the forend so that it cradles the bottom half of the barrel for 5/8" at the forend tip. If you sand it clear except for a little bit at 6 o'clock on the barrel, good things happen. In this case, one ragged hole at 100yds.
Third was my M77 mkII .270 win. Got a load for 150gr. Nosler Partitions at max powder, and no changes to rifle. 5 overlapping holes @ 100yds.
I guess the point here is, sometimes you have to "fuss" with a Ruger a little bit to get it where you want it. I don't mind this, it makes the rifle "mine."