Vihtavuori 24N41 is a single-based treated rifle powder very similar to the 20N29. It has a very large grain size (length 23 mm by diameter 13 mm) and an extremely slow burning rate ideally suited to the .50 BMG. It can also be used for some large capacity cases such as the .300 Lapua Magnum .300 Rem. Ultra Mag and the .338 Lapua Magnum. Of the two 24N41 is slightly faster than 20N29 with a renewed relative burning rate of 39 for the 24N41 compared to 36 for the 20N29 when N110 is given the index 100.