I have too of them, one a brown 54 cal from Trail Guns Armoury days, the other a 58 cal blue. Darned if I can get loose long enough to sort them out. Did learn to wear a long sleeved shirt for the left hand cap spitting on my wrist.
I have two questions:
First, wht's the twist in the 54? Fast enough for a conical?
Second, how closely can you get the two barrels to shoot together?