Thank you so much that helps me make up my mind. I will be at my local gun shop soon so I will confirm the #8/#8 sights. My P320 shoots fine with that combination.My front shows on side of the blade "TG-H3". On edge of dovetail it shows what looks like "D". Not sure if that' a letter "D" or an "O" or a "0".
Rear shows "TG-H1 S1B 8".
Ahh ha..... I see now the number 8 on the front sight.
It appears that I will actually have to find a P226 9mm legion with the #8 front sight. My contrast sights on the 320 are inexpensive but the legion comes with night sights. I was going to order one from my local gun shop but not now. Why would Sig install #6 on some 9mm and #8 on some others?Based on seeing many posts about this it seems the sight number combos of 6 and 8 the Legions ship with may vary just as they do with the new P320s. Maybe depends on which they have more of in the factory on a particular day? The 6F/8R combo seems to be the most commonly seen. That is what I got on my P229 Legion and my P320C. I swapped both fronts out for 8 because like you, I shot low with 6 fronts. All is well now.