Does anybody know where one can purchase powder in the burn speeds between H-LongShot and AA#9 that have been coated with nitroglycerol? See info below on further details: Adding nitroglycerol to the traditional single base powder makes possible in addition to geometry and coating a third controlled variable of ballistic properties: energy content. Vihtavuori calls powders that have nitroglycerol added (maximum 25%) high energy NC-powders, which form N500 series. Geometrically the powders in the N500 series are equal to the N100 series. Although these new powders have a higher energy content, they do not cause greater wear to the gun. This is because the surface of the powder has been treated with an agent designed to reduce barrel wear. N500 series powders work well at different temperatures, even better than the traditional N100 and N300 series. Temperature sensitivity naturally depends very much on the weapon and on the cartridge. The manufacturing technique employed permits a very high bulk density, which in turn makes it possible to use a bigger charge in a certain limited loading volume. Vihtavuori High Energy powders are available in three burning rates: N540 Burning rate like N140. Especially for the .308 Winchester. N550 Burning rate like N150. Especially for the .308 Winchester and .30-06 Springfield. N560 Burning rate like N160. Especially for .270 Winchester and 6.5 x 55 Swedish Mauser. VV offers it in these slower burn speeds for rifles, but somebody has got to have the tools to apply this process to pistol powders.