Looking for data using the Walther FT8-32X56 scope on a rimfire .22LR. The scope is designed for air rifles and the click adjustments are calibrated for 10M. I am looking for a conversion to rimfire standard velocity at 50 yards and beyond. The mildot works but I cannot figure the conversion to get MOA adjustments for the windage and elevation. The basic information is one revolution equals 21MM at 10M. At 50 yards and using rimfire the conversion is posing a challenge.