I've never been an MOA-type shooter, so I can't quote you a group size, I tend to load for terminal performance rather than precision accuracy. But when I shoot a piece of paper, I'm certain that my sights were on the spot I hit, and that it wasn't due to the vagaries of the bullet structure.
My design is much more complex than Steve's (it has 2 cores, a jacket and a tip I make myself), so I'd guess that all the processes I go through to make a bullet might lead to a lower degree of accuracy than his.
I probably should turn some of my bullets over to one of the MOA boys, so he can give me a good evaluation of their accuracy.