Well, I don't know. Used to be that everyone was quite certain that 3f was dangerous in anything over .40 cal. Now it seems like 3f is about as popular as 2f in .50 and .54.
I'd want to see some pressure tested data, I wouldn't be too quick to put down something I've never seen.
As for 200+ yards with roundball, I don't care what kind of scope and rangfinder he uses that is ridicules! If you start a .495" ball at 2300fps, a 5 mph crosswind will drift the ball 18" at 200 yards and over 29" at 250. That's not much wind but still a lot of guess work.
play with gongs at long range but game deserves better. :bull: