Hello ,
I have an old Schultz and Larsen 65DL 7x61 ,did they share the same base size,screw lengths with any other rifle Brands ? at the moment it has a rear Base 116318 Leupold which it too high, the Front base is Leupold 116550 ,I cant find anything in the Leupold bases list and they list nothing for Schultz and Larsen
Thankyou for any help

The rear base on my Model 65 is a Weaver #54, the front is a Weaver #46.

if it will help..
an old weaver chart shows 54 rear and 46 front.

a newer list shows 54 rear and 45 front

54 rear is the same as a 1903 or a BAR.
46 is the same as a M70 front