This is a rifle that has a 45-70 barrel on it but it is not original to the rifle. It was a .40 caliber of some sort at one time.

The serial number and the rifle is in one of Armory Press's single shot books but I don't have a copy of that particular book.

I was wondering if it could be re chambered to a 450 3 1/4
NE

Price is right for a re chamber or just leaving it.