The N100 series powders are single base powders used mainly in rifle calibers. Vihtavuori N165 is a universal powder for magnum rifle calibers with heavy bullets. It works especially well in .338 Lapua Magnum with 250 gr bullets, but can be used for handloading a wide variety of calibers ranging from 6,5×55 SE all the way to .416 Rigby. The N165 powder grains are exactly the same size (1,3 mm length x 1,0 mm diameter) as those of its “big brother” N160, but the surface coating creates the difference in burning characteristics. N165 is a very slow burning rifle powder, making it a superior choice for the same range of cartridges as N160 when using heavier bullets. As slightly higher velocities can be achieved with N165, it is an excellent choice for long-range shooting and big game hunting.