N165 is a very slow burning powder, making it a superior choice for the same range of cartridges as VihtaVuori's N160 when using heavier bullets. Delivering slightly higher velocities with these projectiles makes N165 a wise choice when long-range performance is the goal.
It delivers superb accuracy with heavy bullets in calibers ranging from 6.5x55mm Swede all the way to 416 Rigby, and is a top choice for the 338 Lapua Magnum.
Big Book Catalog, Issue:68, Page:544
Sinclair, Issue:5B, Page:094