My buddy in Texas has an 870 that he can not shoot with just the bead. For whatever reason, he or the gun shoots about 2 feet high. He’s got a beretta that he shoots just fine with a bead, but the stock configuration or something on that gun makes him miss waaaayyyy high. May want to look at getting some different sights if you are shooting with just a bead.
Better luck next time. At least your getting to fool with some.