N540 - 1lb (OUT OF STOCK) [N540-1] |
Burning rate like N140. Especially for the .308 Winchester.
N500 series
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.
Adding nitroglycerol to the high energy N500 series is done by impregnation. After that, the grains are coated with a new type of chemical which results in very progressive burning charact |