When I lay out a big bore stock I give it an automatic 1/2" drop at the heel. Comb is at 1/16 below the cocking piece of the bolt to get your head up as high as it can to keep your face on the gun when you look through your scope. More drop diverts energy down and back so the front of the gun comes up as you rock off that back foot. Although a gun with drop does suck off the bench, they are often more pleasant shoot when standing off hand as one would do off tall sticks in Africa.
Andrew
