I put a K12 Weaver on the one I had for a while. Some of my best long range shots were made with that rifle. Later I traded it in on a .22-250, which was what I wanted in the first place.
Thanks for the info, but as I understand a Weaver K12 will still be too short to work with the target blocks.
I am currently thinking of having a engineering shop copy the current bases without cutting out the slot in the side of the base. Basically it will be two blocks screwing to the barrel right where the current blocks are. I will then have them tack weld a blank weaver rail to the new blocks, this will then be one solid unit attaching to the rifle where the original holes are drilled.
The blocks will be as thin as possible ensuring the rail runs just above the barrel to mount the scope as low as possible from the barrel. Chances are good the scope bell will sit above the rail as a modern scope might not clear the rail when set up close enough to the rear with around 4" eye relief.
If this can work, I do not need to drill an extra set of holes for regular mounts and bases, thus not messing with the originality of the rifle. I guess the rail can also screw to the engineered bases, as long as the rail runs as low as possible to minimize scope height.
Hope someone can tell me whether this might work? In my mind this was a great idea
Pieter