I've got an almost 100 year old rifle, M1917 Eddystone barrel dated 4-18 and serial #is in that month. It was rearsenaled during WW2 at Odgen Arsenal and put in cosmoline. The rifle was prestine then and nothing appears to have been done to it other than inspection and cosmoline. It really looks like it's never been issued. I've had it about 20 years and it's still in the grease. My question is do I want to clean it up and shoot it with cast or should I just leave it in the grease and hand it down to posterity? It's not like I don't have other 30-06s to shoot. So what do I do? Appreciate any responses.