rgchristensen wrote on May 19^th, 2018 at 2:37am:

Yeah!  Looks like my decimal point slipped a cog 

Lapping the rings will show you where the misalignment, if any, is.

Finest selection of shim stock is a Harbor Freight feeler gage.  Many sizes, all labeled at about $ .99

I have two CPA 44 1/2's and use Frank Russell's base to adapt the external adjustment scope bases to an internal adjustment scope. This base fits on the external scope blocks and has a Weaver base on top for Weaver rings. The scope base as bought was nearly centered when swapping barrels. The point of impact was always predictable. 

I use the Burris Signature Zee rings to be able to further refine the scope to be centered in adjustment at 200 yards. Swapping from the .32-20 barrel to the .25-20 on each rifle shows an eighteen inch difference in impact at 200 yards and that differential had to be moderated. That is the use of the Burris rings and setting a midpoint to enable the swap between barrels.

It is now easy to switch scopes from internal adjustment to external adjustment by just removing the base. In this manner, a person can shoot Traditional classes, ASSRA open classes, ISSA classes and CBA Plain Base class with one rifle.

Bucksnort,
You and I are working with the same stuff. #1 - I have tried numerous scopes and am 100% satisfied with my Weaver T-36 on my CPA in .32-20CPA.  #2 - I use the Leupold 45 Competition on my CPA 22LR RF set up with BR stock & forend (same as the .32). I chose the 45 only for increased magnification to enable me to better spot my point of impact. Honestly, I don't know that it's any better for me than the Weaver T-36. I plan to do more testing with the Weaver. 
Both my internally adjustable scopes are set up in Burris Signature rings. I take plenty of time with the installation. The scope is set at it's center for both vertical and horizontal adjustment. I then work with the Burris inserts to achieve my chosen point of impact. Since I shoot at both 100 yds. and 200 yds., I install the scope so that vertical is dead on and horizontal is on center bull at 140 yards. It's pretty time consuming, but with this set up, it requires minimum horizontal clicks from the scopes center of adjustment range. I feel this is mechanically least stressful for the scope and it gives me plenty of adjustment for adverse conditions. Most important - the Burris signature inserts and take your time to set it up precisely. Hope this helps.