I may be dense but I thought 38-55 were .375. I don't know about specific rifles but I would expect them to be the correct diameter.
I stand corrected and ashamed.
I have a 38-55 M94 "Legendary Frontiersman" built circa 1980. It's groove diameter is .3776"
I have shot Barnes original .377" Jacketed SP bullet with very fine success.
Even the 255 grain Barnes SP for the 375 Winchester [.375" dia] shoots well in my rifle.
However, when shooting cast, I need at least .379" to shoot well, with .380" being the best of all.
You should "slug" the bore of your highwall, Douglas, just so you know exactly what that groove diameter is.
Regards, Eagleye



























