The estimated shelf-lifetime of Vihtavuori gunpowders is a minimum of a decade, if stored and sealed in its primary containers in a temperature circa 20°C and relative humidity of circa fifty five %. All Vihtavuori reloading powders are packed into bottles and canisters and even further in fiberboard packing containers. https://beni-mguild-rug10628.ouyawiki.com/3718957/a_simple_key_for_vihtavuori_n32c_unveiled