The N300 series powders(Vihtavuori N340 For Sale ) are one base porous powders for handguns. Formerly referred to as 3N18, the N340 is a real multipurpose powder, produced originally for 9mm and shotshell masses. This pistol powder one of the preferred powders while in the Vihtavuori N300 sequence, and it https://flockarms.com/product/vihtavuori-n340-powder-4-lb/