The correct answer is to pattern your ammo selections with various choke tubes. Most of us don’t bother for casual sporting. Tedious to count pellets in circles. But,some big cardboard sheets, a marker pen and a box or three of various ammo will tell you a lot about your shotgun, whether it is regulated correctly (both barrels shoot to the same point of aim), and whether it shoots a bit high or dead on, etc.
Good luck with it, and the Briley chokes are excellent in my 20 ga 686, but nothing is wrong with the factory chokes either.
