Get some Cerrosafe and make a casting of the chamber. Report back to us. I'm quite curious as to what has been done to your rifle.
Were it chambered for 30 Remington, the bolt face would need to be altered in such a way I think would be quite a task.

Were it a 30-30 improved, I'd think it would be stamped 30 AI.

There is a 30 R Blaser, but it was developed in 1991. I'm guessing this work predates that.

Granny didn't send ammo with it when she loaned it to you?

Last edited by gregintenn; 03/24/17.