Thread: Expected spread for a full choked 12 gauge @ 30 meters?

I wonder if people are thinking of a mid rib bead when saying rear sight. That sort of functions to ensure your eyes are in line down the rib and gives some idea of elevation hold, ie figure 8 the beads, align them or have some daylight between them. With a side by side your eye automatically centres the only variable becomes elevation of your head and cheek weld