Love it when someone like H4831 comes up with a bit of history on powders to bullet tips to rounds. I have some 62 yrs of continual m/c riding experience under my belt (that includes comp riding in most form from '47 till '89) so I am the oldest on many of the m/c boards in the USA. I have been riding longer then some of the present riders were jewel in their Father's eye a few ys back.
Still I'm h/gun director at our Club & some chaps, that use to shoot or were older members (still at 77 yrs of age I to am a bit old) will hand me some containers of powder to factory or hand loads. I thank them & knowing said powder has possibly been hanging around their home or in the garage for umpteen yrs of heat & freezing temps. So open up the container & the SMELL is there so it is dumped in my yard, If the brass is rifle brass I offer it to fellow members, but if h/gun loads then I remove the bullet tips that go in for the next melt down & will decape said brass, size it & use it.