A friend of mine inherrited all of his grandfathers reloading supplies, i was helping him go through it to figure out was still good and what was bad. We came across a sealed container appears to have been never openned labelled Dupont lightning rifle powder dated 9/1906. this powder being nearly 100 years old would it still be good even if it is in its original unopenned container??? if it is still good is it a good powder?? is there someway to get load data for it??