The best way to sight these light magazine rifles, and double rifles, is a standing rest. If you only have a bench rest, try to use a more upright position and use your hand under the fore end, grasping it as you would for a hunting shot. The idea is to reproduce the hunting shot as best as possible.

Different grouping and point of impact is quite possible with this type of rifle if you really get down on it, like you're shooting benchrest.