Lowering your drop can be achieved this way, but IMHO its better left to semi autos and pump guns and not doubles. You see some new semi autos come with stock head shim kits to change the angle the wood mates up against the receiver. If the wood to metal fit is any good to start, I guarantee you will have either a low or high spot after adjusting the inletting enough to achieve a change in drop. Simply taking the comb down with a rasp, file, plane, or what-have you, and then refinishing it all or blending in the existing finish is going to give you your desired drop and not bugger up the inletting.
