WANNA BET? It might be a little more convenient, but that's about it.
A pal has a 56-50 repro he reloads with homemade tubes he carries in the inside pocket of his frock coat. This is his main match rifle, so he is experienced with it. Obviously, he is not a "gamer"; going for "style" points instead.
I can draw up the follower and swivel the nose cap a lot faster on my Henry, dropping in rounds from a pouch, pocket or bandolier. But, too much haste could be disastrous, if I ever let that follower slam down like an elevator shaft!
He can only load 7 rds. Since most CAS stages require 10 rds, he is severely handicapped, having to single load three rds to complete a stage, an awkward proposition when the clock is running.
Normal operation requires cocking the rifle and operating the lever to chamber a round. Spencer shooters do this rather than the reverse to avoid letting the hammer slip with a chambered round, just as do most SxS shooters.
I recently watched a video of a costumed "frontiersman" (German, I believe) load and fire his Henry with BP. He was dropping in the rounds with the rifle in a vertical position! The proper technique is to hold the rifle horizontally to load.
I can imagine that a detonation with BP loads would be quite spectacular! Much more so than that of the smokeless variety I've witnessed. I don't want to find out first hand.
the spencer is a faster reload with tubes though