Vihtavuori N165 rifle powder is a very slow burning powder, making it a superior choice for the same range of cartridges as with the Vihtavuori N160 when using heavier bullets. Delivering slightly higher velocities with these projectiles makes N165 a wise choice for the handloader when long-range performance is the goal. The N165 powder delivers superb accuracy with heavy bullets in calibers ranging from 6,5x55 SE all the way to .416 Rigby, and is a top choice for the .338 Lapua Magnum.