I opened a previously sealed metal 1 pound can of 4895 powder tonight and got a cloud of orange rust colored dust. Opened another identical can of same age and it seems fine. Both cans are probably 20 or maybe even 25 years old. Both were probably purchased at the same time. Both have been stored side by side same conditions. Cool dark basement reloading room with dehumidifier. Anybody else think that is odd? I'm going to fire 5 rounds before I load up any more.