It CAN change from load to load. Not always, but different wads, payload weight and velocities can effect POI. My SBE II shoots the EXACT same POI with Federal Heavyweight 7s, Hevishot 6s and the Longbeards. Same thing for my 835. Not the case with my 20 gauge 870 or my nephew's 500. Change the load, change the POI. No definites though with shotguns...