Get Vihtavuori N565 Smokeless Gun Powder Online. The burn up charge of the powder is a bit closer to N570, approximately splitting the distinction between the two. Vihtavuori N565 is a single perforated extruded powder, using a bulk density of 960 g/l and an Electricity content material of 4000 J/g. https://ammoand-supply.com/product/n165-powder/