I have a savage 1899 in 250-3000.It has a checkered trigger and serial #175xxx. I believe it was made between 1915-1920. I also have a 410 shotgun barrel for it with same serial#. I know much of the collector value is lost because previous owner installed recoil pad and threaded muzzle for some barrel attachment. It is also tapped for scope. Is the 410 barrel very rare? Can anyone tell me anything about rifle? By the way it shoots real nice with 87gr speer bullets.