rdn,
I presently have the "C" shim (60mm) installed on my SBE 1 and wanted to know if you knew what the Drop at Comb or Drop at Heel dimensions change when installing the "D" shim (64 mm)?
Looking to find a good turkey choke tube pattern using 3 1/2 " Federal #5 shot or #6 shot. My question is what Parrellel Diameter (constriction) is working out there? It looks like the .660 Parrell Diameter is popular, anyone have good results with the .675?