Dan,
I haven't run into any problems using UH rifles at any of the clubs that I shoot at but I suppose there could be some who take exception to them, although I agree not to know why. The buck and ball gun you pictured is pretty interesting. They are not unusual to find but I have not seen one in UH before.
Mark
The Museum in Cody has a LOT of stuff. Makes me wonder what is in storage.
No problems with UHs? Some places, I am told, ban them if they don't use the TG as a mainspring. So a Billinghurst would be legal and a DH Hilliard of the same vintage not.
Apparently someone has shown up with Hilliard UH that shot too well at some point.
Don't bring one to the Wyoming State shoot.
I am told on good authority that UHs are verbotten. Apparently they got whipped by an UH at some point.
Anyway if you travel to matches do your home work.
The folks I shoot with understand history and its shoot what you bring so long as its not too modern.
Dan