I am all but 100% sure that the stock will have drop to accomodate the express sights and not the scope.

I would suggest that you look into a lace on leather comb/cheakpiece or perhaps one of the neoprene versions which stretch to slip on. There are quicker on and off velcro versions as well.

I use one on a slug shotgun equiped with a scope which has a low comb. It makes a world of difference in both more accurate shooting and reduced felt recoil.

Another option is mounting an aimpoint type red dot in lieu of a scope or reliance on open sights. You may read about what some fellows are doing at AccurateReloading.com, in the double rifle forum. Try the search function.

JPK