Very much appreciate everyone's help....
Looks like I'm gonna have to find a gunsmith.
My dad always just fired .38 specials through it of course....but he was a rough old timer with little regard for his own safety...heehee
I have an old US Army 1892 Colt that's supposed to use .38 Long Colt ammo.....I was told this revolver at some point had a more modern barrel put on it possibly so that it could fire more modern ammo?
As far as I know my father always shot either bird shot, or .38 specials through this revolver...