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Save for a single .223 M-77MKII (which I tried & sold within two weeks), the only Model 77 rifles I've owned/shot/hunted since the mid-70's (about 20) were various tang-safety models, of which I've bought/used M-77 RSI's in .250 Savage (3), .243Win (1), .308Win (4), .270Win (1) & .30-06 (1).
I shot all the RSI's scoped (1 of the .308's got an Aimpoint red dot sight), and used only commercial ammo in the RSI's.
Most gave me excellent accuracy @ 100yds, like 3/4" (.30-06) to 1-1/4" (.250) groups - EXCEPT for those four chambered in .308Win (go figure).
I couldn't get any of the .308's to shoot closer @ 100yds than 2-1/2" groups (at best), with most of the groups in the 3"-3-1/2" range (at worst).
That's still "minute-of-deer", though not good enough for me.
YMMV, of course.
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