Buckeye - I've one. With American factory ammo its a 1.5MOA at best...have not hand-loaded for it yet. As for ComBlock (sorry not quite PC) ammo I have not used it.
Lottsa folks at the range like the M77 and, since adding a thicker recoil pad to increase LOP, a joy to shoot. Sort of like a bolt .30-30. BarnOwl