i have 2 sxs (410 and 20) and none shoot to the poa and have diff poi. he can elaborate on the subject but you file the barrel /choke in the direction you want the pattern to go. if its low, you file at 12 o’clock
I have a 410 Stevens SxS fixed full choke barrels, it shoots a great pattern with TSS. The right side barrel shoots to the left of a Turkey head at 35 yards, the left side barrel shoots to the right of a Turkey head at 35 yards.
I also have a ATI Turkey Fowl O/U 410, it has screw in chokes .The bottom barrel shoots really low. I’m working on patterning it for turkeys now. This is good info, if it works! Thanks, Robinhedd