Stick it! Hit it! See it! Every time!
These reactive targets by Birchwood Casey make sighting-in easy! There are five reactive targets on each 17.75" sheet (you get 5 sheets) – use the center target for sighting-in and four smaller targets for testing results of various ballistic loads or for confirmation of sight-in groups. Convenient 1” numbered grid lines simplify scope adjustments.
It was easy to order my reactive targets from Gun Goddess and received them in good shape quick.