I have just acquired an M1917. It is in great condition in original bluing. It does not have any signs of sporterizing. However, it has a top notch in the receiver, which I can't explain. I am NOT referring to the side ejection notch. This is a rounded notch, just like you see in the Commission 88s that have been rearsenelled to the "S" longer cartridges. Its a Remington rifle and the notch has the same bluing as the rest of the rifle. The sharp markings indicate that the rifle has not been refinished, and the bluing indicates that it was not rearsenelled for WWII. I've read three possibilities for this notch: - Sporterized for longer magnum cartridge. - Government mod for .22LR training adapter. - Pederson MkII device modification (apparantly planned for the M1917) The former seems odd, given the pristine nature of the rest of the receiver and what appears to be original bluing (has 30-06 barrel). Has a numbered stock (oddly for US gun) that matches receiver. I can't find anything on the .22LR adapter, and I'm doubtful of the authenticity of the third. There was also a statment that the Norwegians might have gotten gung ho about notching their 98k Mausers for 30-06 and notched a few of their M1917s. I don't think that's likely at all. Does anyone have an idea? Sorry I don't have a photo right now.