Hey, Greg, when you put that on.................
a couple things I do:
To get finer adjustments, I mount on the barrel, and ON THE BRIDGE. This gives in excess of 10" of separation of the mounting points.
When I'm finished for the day, I loosen the knob at 7 O'Clock (looking forward) which reduces the tension on the mount spring which forces the 'scope against the adjustment points. I think I unscrew it 2-3 turns, enough for it to almost, but not quite, come off the threads, maybe a turn shy.
I have seen and heard of these 'scopes having been abused, so that it is almost impossible to mount them on anything heavier than a Hornet, as the large disc on the clamping spring will no longer attain purchase enough to restrain the 'scope in recoil, and/or the slot is all buggered-up. (Its a shame how some of these get treated by those who haven't the knowledge, or don't care, because it isn't a "real" 'scope[receiver-mounted]) Now, I put the rifle on the bags, then compress the 'scope spring snugly in the rear mount by turning the head in, until it just stops, then compress the recoil spring about 50% or just a bit more (its on a 6MM Rem., and the recoil impulse seems a tad "snappy"), and I don't want all that 'scope sliding around. And, if you have a bit more compression, not only does it seem to stay where I want it to, but the groups seem to be a bit more consistent. Now this year, I'm going to get the hardware its mounted on cryo'd and see if there is any decrease in the vertical, but I never really let it get warm enough to change that much, if any, but, what the hay, anyway?
Just to clarify, when I set it on the bags, I tighten up the screw that puts Northeast pressure on the 'scope tube, THEN I compress the recoil spring. THEN.....I may sit down and attend to everything else. I do it this way because once, I...ONCE...I watched as the un-compressed recoil spring allowed the 'scope to go on a rapid-ride forward. Once was enough....
I just thought I'd let you know how I did things, because I like the old Owl-Eye, and I want to keep it around longer that I am, then I won't miss it.
I just thought you might find this helpful, as I guess in the thick of things many may not think of these things, I know I didn't for awhile.....
HTH