I finally got to watch the whole video. Very nice patterns.
I got to the point that small projectiles were not producing out at 200 yards, and started shooting 75g Sierra Matchking with Varget powder.
Then I was finally shooting sub-moa at 200
I only tried a couple other powders, with worse results. I started with Varget because the world champ used that powder the previous year, and it was available locally.