Ok here is my question for all you seasoned TSS users, I recently set up two shotguns for this coming spring hunts, first a Stevens 301 20 gauge with an Indian Creek .562 choke, the second is my ole true 870 20-gauge, youth model with Indian Creek .570 choke that I swapped out both the stock and foregrip. With TSS being so damn expensive and having to sight in the red dots on both, my go to TSS has been Apex GT-20 #9's and usually I would sight in with dove shots and then finalize with TSS #9 the load I would hunt with. I want to know, since I have a few boxes of Apex TSS #7.5 will my PI shift greatly from 7.5 to 9's. Obviously, though $16 per shot, I don't want to miss any opportunity for a down bird.