Sorry, phyically impossible to have a gun recoil the same way in a sitting postion (bench) and standing position. Double Gun regulation is about the recoil, twist, lift, weight, grip and load. I'm not saying they can't be close, but they are not the same period. You can prove this to your self the next time you build a double rifle and regulate the barrels; just as I did. You will then see after, you build the gun, that there is a difference. Just saying.