Thanks for doing this. If I have some of the new IMI boxes, I don't think I've shot it yet, but the accuracy of your brown box loads seem to match what I've seen, albeit from shorter barrels (18", 16", 12.5"). I will say that my ~2012 BH Blue Box 77gr did better than your red box out of my MK12, but I think those two were just a really great match. It's a shame it's pretty much all gone now from my ammo larder.