This looks perfect in more ways than one:
Good to see the SHV fits a Ruger M77 with the OEM 30mm standard rings.
I found the extension ring from Ruger in 1" only not 30mm.
4 ringtop screws beats 2 every time.
6 is even better.
I have no problems at all since I started accepting the Picatinny rail on anything I have.
especially since learning about NEAR MFG rail for Winchester M70 LA and SA and etc.
I have the NEAR MFG rail on FN M98 also.
Burris 30mm LOW XTac rings allow SHV scope to go from M98 to M70 with ease.
Any scope, any rifle. All problems solved.
The Burris X-Tac rings are surprising light for all their bulk.
Strong.
The steel cross bolt on the bottom is square on one side, with the opposite side slightly rounded.
This requires the half-inch nuts to go on the right side of the rifle.
Cannot reverse to nuts on left side of rifle if you are doing it correctly.
Not so for Biggus Stickus, as he is using SWFA rings that can have the nuts on the left side.