Thank you for the pics. A slab sided action doesn't lend itself to a rounded profile easily. Try to blend it back not from the receiver but from the middle of the bottom trigger guard screw. Getting the pistol grip off will allow some leeway in making the stock look as you desire. The toe line(behind the pistol grip) will have to be raised to make it look right IMO). By putting flutes in the comb you should be able to bring the top into a rounder profile.

Dennis Earl Smith/Benefactor Life NRA, ACGG Professional member