I shot it for quite a while, I am not sure weather it is the humidity or if I just got a hold of some bad powder,new can just bought shot all over the place had been shooting excellant, tried several cans from the same source and the same lot all were bad tried some I had stored and it shot just fine. I dont like things I can not depend on am shooting Pyrodex at the moment it has been the only sub that has been really dependable. By nature the asorbic acid subs are sensitive to moisture,I also wonder about their quality control. Lee