I have a .50 cal percussion blued Deerstalker. It's not qute broken in yet though, but these are my thought on it:
I initially, due to a lack of understanding of traditional projectiles, figured a RB was about worthless as it didn't hold on to it's energy for long with it's low BC value. Having read far too many accounts of RB's giving complete passthroughs on deer out to 125 yds or so gave me reason to reconsider. I've been shooting RB's through mine so far, and intend on doing so unless I hunt something substantial, in which I'll try conicals.
The design of the rifle is a mix of traditional and modern. A side lock, but with a recoil pad, fiber optic sights, and a stock design more reminiscent of a modern gun, as well as modern sling swivel mounts. But I liked these options.
I chose this rifle over a Traditions Deerhunter and Pedersoli Country Hunter. The Pedersoli may or may not have been a better choice. It's doubtful I'll ever find out. But I'm pleased with my choice so far. I was looking for a handy sized stalking rifle.
I've yet to work on accuracy, but 70 grns of Pyrodex (RS/P) and a .490" RB using grape seed oil for patch lube, and cleaning between every 3-5 shots, gives me groups ~3" at 50 yds. It's likely this can be cut in half I'd guess. I may not find 1/2, but it's likely capable of it with some arrangement of ball diameter, patch thickness, powder granulation, charge, cap, etc. I'll be happy with 4" groups at 100 yds, and will try to some extent to get the best I can, but I can't say I'll spend my lifetime searching for it.
If shooting other than RB's you may want to consider their stainless model as it has shallow grooves.
I am a bit curious as to what constitutes traditional hunting in the club. I'm not exactly a purist, and will likely try different things to see what works and doesn't, but it is odd to me to consider "traditional" with non traditional things. I won't flame you for it though.
What are your hunting conditions? You may find a better option depending.