I thought I was out of powder and was getting ready to go buy more when I found in the bottom of my ammo box a full bottle (1lb) of Hodgdon 777. It has been in a cool dry place with the lid on. My concern is that i bought it 2 maybe 3 years ago. I know it will still shoot but my question to you guys is, do you think it still has the same "bang" as fresh powder? I ask because I've read (probably on here) that 777 will lose its effectiveness rather quickly.