I've been an avid shooter for around ten years now and have always used traditional black powder. Having said that, I still have almost 2/3 LB. of Pyrodex RS that won't work anymore. I bought the stuff back when I was first introduced to muzzle loading and installed one of those funkey looking funels on the plastic can and left it. I never had it outside in high moisture or anything and always stored it in the closet. The other day I tried to use a little during a re-enacting event and all it would do is fizz. Have any of you guys had trouble with the stuff before? What can be done with it besides throw it away? It makes me think it may be damp but it pours out of the can too good and fine with no clumps. Thanks for any replies...