If watching through a spotting scope there is a HUGE visual difference between the trajectories and flights of a 400gr. vs. 500gr. and 550gr. bullets. Really an interesting observation, actually.
At Helfely Creek rendezvous, back in about 2008, a fellow won the first Quigley match using an original TrapDoor Springfield rifle, with bumped up #457125's amount of BP, grade and make, unknown. This was an offhand match. The horizontal distance to the steel plate was around 680yards, 750 on the angle.
Buddy Len won the Quigley match last August, same shoot, but mulltiple ranges to 650yards, offhand and a couple cross stick shots (their cross sticks only), Len was using a factory Navy Arms Rolling Block with Lyman#457125's and 65gr. 2F GOEX. He shoots it too well. Taylor and I came in second and third using Taylor's .50/90. There were mostly .45/70's, Sharps, rolling blocks with a few 38/55's and a .45 2.4" along with a .32/40 Highwall used.