Gary O
For mounts i use a 3 1/3 inch lag screw bolt leaving about 3/4 to 1 inch sticking out of the wall.
Horn and shields i use # 12 3 inch screws with about 1/2 to 3/4 inch sticking out of the wall.
I place 1/4 felt pads on the back side of all my mounts and horns/shields. Not sticking to the wall and holds the trophies in place.