Shimming rings to fit a tube taper

[BeaverMeat]

What is a 'clean' method to shim a scope ring to fit a tube diameter reducing taper at the objective bell?

The scope is a Kahles 39 S2 to be mounted with 26mm Buehler rings on a Micro-dial base. A really good looking set-up in my eyes and I am hellbent on getting it to work.

Any ideas without damaging the scope?

 

[bearkilr]

You want to mount the front ring exactly over the objective taper and tube intersection? I'd say that's a bad idea to attempt, you'll damage the scope. I doubt you could get it to be a close enough fit that it would hold firm. Can't move the scope ahead a touch so the whole ring is on the tube only?

 

[BeaverMeat]

You want to mount the front ring exactly over the objective taper and tube intersection? I'd say that's a bad idea to attempt, you'll damage the scope. I doubt you could get it to be a close enough fit that it would hold firm. Can't move the scope ahead a touch so the whole ring is on the tube only?

When moved all the way forward the front ring grips right where the taper begins. Although only half of the ring is gripping the full 26mm tube and there is a visible gap at the front. Either way, the scope and mount are incompatible.

My initial set-up was a Redfield base with a front extended ring. But low 26mm bottom screw rings with a extended front are very few and far between. Leupolds will work, but i think they look like crap and are a bit pricey. Weaver grand slams do not come in a low extended front ring, only medium.

I got lucky when I found these 26mm Buehler rings, so I want to use them.

 

[bearkilr]

So what you're saying is that the tube is too short for the current set up? Or is this for proper eye relief? Either way, you can't have half the ring gripping the objective taper. Both rings have to be on the tube only. If you could get a picture that would help out a lot.