Phantom Rancher (1940)
Henchman Luke: What are you doin' around here?
Ken Mitchell: Tracin' a 32-20 rifle. I'd like to shake hands with the man who killed Markham. 32-20s do a nice neat job.
Henchman Luke: Oh, yeah? The Mitchells are awful smart.
Ken Mitchell: Think I don't know the crack of a 32-20 when I hear it?
Henchman Luke: I'll say you don't. I use a 30-30!
Ken Mitchell: [pulls out a 30-30 slug from his shirt pocket] Thanks for admittin' it.