A couple of months ago I scored a pound of Unique at a local gun show. I noticed it was in a non-current bottle but didn't give it much thought as I know powder has a long shelf life. When I started using it to load some 12 gauge shells, I checked out the date on the side of the container, it was Aug 21 '98. Wonder where this powder has been for 21 years? Fired some of the shells and the powder works just fine.......