Somebody gave me a box of really old Federal 270 wins.
Was a lot of "green" around the bullets and case mouths. I figured these shells had gone through a lot of heating, cooling, and moisture associated with many seasons of Being in pickup trucks, cabins, and out in the woods....
For fun i thought I would pull one down and I was pretty surprised.... no signs of bonding and everything from the case mouth down the inside looked pretty much pristine.
Just reporting what I saw...
