Ive got some of those segmented subsonics, work wonders on a raccoon too, although i think 3 shots center mass of just about any 22lr will take care of things
I shoot two 870s, both with just a front bead. I like to blame the stock sights when I miss a bird, but we all know its the ammos fault honestly. No way I could have missed that shot.
But in all honesty, I dont even consciously look at the one bead, much less if there was a mid bead too