i just got my order from graf and sons. i got some swiss brand and some of there own graf brand of black powder. the graf&sons brand bottles say its from feb. 2005. kinda bummed because the re-search i found on the internet said the newer version of this powder which is actually made in germany by another company was supposed to be better formulated. the order cant be returned but do you think getting over 3 year old black powder is not such a great deal. they do have the new stuff in stock but they tell me they need to sell the old first. what is the shelf life of regular good old black powder?