Brett
In most cases i just ask the seller what year frame it came off , as for my 30/30 barrel , it came from a parted out rifle were i got the barrel , Msp Ret. got the frame and someone else got the stocks , the seller listed the year when he put the rifle up forsale .
I have a 22" 45/70 barrel that i am not sure what year that it was from but the guy i got from had it fitted to a 04 frame and it fit all of my 04 frames just fine .
For what its worth , i am going to start keeping a log of barrels and frames to see if there is any value to this .
stimpy