I would love to think all my rifles were capable of sub 1/3 MOA at 1000 yards. But that would be delusional. The scope, shooter, load, and the man loading, all play a part in the final outcome. John is an admitted OCD sufferer to the 10th power when it comes to his shooting/loading. I could not list all the other things he does or has tried in the efforts for the best loads. When I am testing somthing for him, as stated, he does not privy or predispose me to a bias before firing the test.
Does it make a difference, YES, He proved it to himself so thats all I care about. Do I load my ammo based on what he does NO, I don't have the competitive drive that this man does, nor the time. My most important ammo I load is for hunting and I don't have to hit a 5" x ring at 1000 yards.