How do you sight a powerline 901?

Answer 1

See the link below for the owners manual. See page 6 when it opens.

Aim at a target 15 feet away and fire a round. If you hit high on the target then lower the rear sight one notch. If you hit low to the opposite. If you hit right then adjust the rear sight slightly to the left and do the opposite if you hit too far left.

I suggest you bench rest and fire the rifle for this adjustment.