Does anyone out there in know of a quality Picatinny rail that can be mounted to the built-in integral mount on a Ruger M77? Is that even practical? I'm a Remington guy so the M77 is a little foreign to me.
Sell the M77 and get a Vanguard/Howa, Rem or Savage
FWIW, Burris makes a "Ruger to Weaver" two piece adapter. Then the Signature Zee rings will attach to the "new" bases. I am not 100% sure, but I believe you can get 20moa inserts for those rings. If I am remembering correctly, they come standard with 10moa capability.
I know this isn't exactly what you were asking for, but it is an option if for some reason you cant find a one piece 1913 rail.?