Sight the rifle/scope in at the range you expect to shoot mostly. If you will have an average hunting shot between 40-60 yards, sight the rifle in at 50 yards with the compensator set at 50 yards.

Redhead Pursuit is not an expensive scope.
In lower-quality scopes, there are other sources of parallax. If the reticule is not precisely placed the correct distance from the objective, the distance of no parallax will be exaggerated.

You can check the parallax of any scope by sighting an object at normal shooting distance (not indoors), by moving your eye side to side (then up and down), as far as you can, keeping the sighted object within the field of view. The apparent movement of the reticule in relation the target is parallax.

The parallax increases with magnification.