At anything over 50 yards, shooting sticks really help- for one thing, you can have your gun at ready without exerting yourself. I set up so that I am covering where I Expect the critter to come in. Sometimes I have to switch to my left shoulder to swing more to the right. Check your coverage before you start tooting.
If I expected to shoot 400 yards on a stand, a prone bipod or tripod would be better but I have no problems taking head shots out to 200.
