vihtavuori n550 OverviewMidwest now gives VihtaVuori N550 Smokeless Powder in stock now available for sale in one Lb and eight Lb.N550 is used by the very best shooters and makers in the shooting sector, Vihtavuori N550 Smokeless Powder has attained a great popularity for staying one of the better smokeless powders offered.Vihtavuori Smokeless Powd