if i pull bullets and for whatever reason don't return it's powder to it's container i'll dump into an old powder jug or 1 # container and when about full i'll use as fertilizer. WELL, i picked up such a jug and shook it and noted it sounded clumpy so i opened and looked inside and was hit with the aroma of ALMONDS! i knew that cyanide gas has a distinct aroma of almonds, so i put the top back on in 2 nanoseconds and went outside and breathed in and out till i almost got dizzy...i survived. after a little research i read that hydrogen cyanide or one such component has or is used in the manufacture of smokeless propellant. there was a mix of many brands in that container. i won't smell these containers again and will dump them when partially full. also, it is uncommon now for me to have to dump powder. just a not of caution...if such a container is buldging, DO NOT OPEN!