Just watched this today. They didn’t use the 777 primers for this test either, but IIRC White Hots were the cleanest-burning of those tested, had low SDs, and gave good velocities.
I still recommend BH209 over other substitutes, but realize that price and availability are major issues with it right now. I’m sitting on a 5-pounder I scored before “the troubles” so that’s what I’m using in any gun I can light with primers.
