Fox,
I'm sure Rocketman will be by shortly to expound on this.
There is no single "correct" balance point for a shotgun; there is only what you personally prefer. And balance point is only one of several "swing" variables. A broomstick with bricks attached at the two far ends of the stick and a another broomstick with bricks attached right next to each other in the middle of the stick will both balance at the same spot (the middle of the stick), but the dynamics between the two sticks when swung will be drastically different. This is why "balance point", by itself, is not especially helpful.
SxS advertising blather often makes a point of touting that a gun "balances on the hinge pin" as if this was the ideal. Repeated often enough and people start to believe this means a lot by itself. The "best" balance point is one where the gun feels the "best" in YOUR hands. That point will vary from person to person depending on their personal preferences for how they like a gun to feel when swung. Rocketman can provide "typical" balance point measurements.
Good luck,
Ken
