I've built more than a few .38s, mostly in the 38-50 Remington Hepburn chambering. ( a WAY better BP cartridge than .38-55).
That bore size is ALWAYS a problem , weight wise.
There's a Shilo '74 on consignment over at my LGS, standard 30, maybe 32" # 1 heavy bbl profile.....in .38-55.
Pretty rifle, .... but STUPID heavy, that one.
GTC