I bought a case of SK Match that has outshot any other ammo I've ever bought.
I just bought it for practice, now hoard it.
As someone once told me about finding lots of Eley black box that shot as well or better than red box, red box makes a lot of money per unit sold but black box makes a lot by volume sold. Guessing that some of the black box would be red box quality but they had more orders for black box.
Orders have nothing to do with it, all Tennex and Match come from a single line then tested in their tunnel. The best grouping goes in red boxes, then black boxes.
That said, there is plenty of match shooting better in lots of guns.