Mount will not compensate a severely drooped barrel - Leapers UTG Compensation Scope Mount for RWS Airgun w/ T06 Trigger

Ordered the MNT-DNT06 for use on a new Diana RWS Model 34 .22 cal. Although the mount has a moderate amount of droop compensation designed in it is not enough if you are unlucky enough to receive a RWS break barrel with severe droop.

At full up elevation adjustment with three separate scopes of varying quality the gun continued to shoot 15-18" low. To complicate things more one of the scopes (also brand new, bought for this gun, a Leapers 3-9x32mm UTG Bug Buster) had no working elevation or windage and had to be returned). Currently no one offers a RWS T06 scope mount with severe droop compensation.

After researching on the internet, calls to Umarex, and questions posed to several air gun forums the suggestions ran from bending the barrel in a home made jig, to shimming the scope, obtain a much costlier scope with extra elevation and windage built in and just sending the gun back for a replacement unit. Many other Model 34 owners indicated they had a similar problem so I assumed a replacement may yield another severly drooped barrel. I ruled out the barrel bending and was not inclined to shim a Leupold scope from my AR15 and risk bending the tube. While waiting for the Bug Busters return I ended up shimming under the back end of the MNT-DMT06 with two pieces of copper sheet (3/8"x1" just behind the rear scope stop screw to the end of the mount) each piece measured .017 thickness for a total raise of .034. This produced a shot placement approximately 6-7 inches high with the re-centered Leupold Vari-x Patrol 3-9x40mm scope and easily adjusted to point of aim with 15-18 clicks down elevation at 30 yards. Will wait until return of defective Leapers Bug Buster to determine if one or two scope mount shims are needed. I have a concern if shimming under the scope mount will stay locked down and stay in place with the vibration of a break barrel like the Model 34. I guess time will tell.