Using a sharpshooting expertise on a trigger-happy pawn and inspecting their shooting accuracy the sharpshooting skill does not appear to do anything of significance. When I hover over it, there is no modification from the skill in the calculation at all. Tested by aiming at other pawns at variable distances, I removed sharpshooter from the pawn and tested the % chance to hit target with shooting 0 15 and 20 and then with sharpshooter at 0 (shooting 15) and both skills at 20. Sharpshooter did not appear in the calculations nor did the % change