Yes, I use one on both my LR rigs. Whatever style you choose, they are simple, light, and effective. They eliminate 1 more variable from your LR shot. Often in mountainous terrain in a hunting situation, leveling by sight can be extreemly decieving. The ACD takes the guess work out of it. A canted rifle will be responsible for shots right or left depending on direction of cant and in all case (unless youre shooting from an upside down position for you smart a$$es out there!) will also cause a lower impact. Obviously, the greater the range and the greater the cant, the more pronounced it will be.