Vihtavuori 20N29 rifle powder

This Vihtavuori rifle powder was originally developed for .50 BMG and for military use, and even the name 20N29 originates from the Finnish Army standards.

Vihtavuori offers two rifle powders specifically for the .50 BMG case; 24N41 and 20N29. These are single-based treated powders, having very large grain size and  extremely slow burning rates ideally suited to the .50 BMG. They also have some application in a few other very large capacity cases, such as the .30-378 Weatherby Magnum. Of the two, 24N41 is slightly faster than 20N29, with renewed relative burning rates 39 for the 24N41 and 36 for the 20N29, when N110 is given the index 100.

20N29 is a single-based, surface treated powder with grain dimensions of 2,3 mm length and 1,3 mm diameter. The burning rate is slower and grain size larger than those of the N100 series powders. 20N29 is primarily used in large caliber and magnum applications with heavy bullets and in long-range target shooting. It is ideally suited for the .50 BMG, but has also gained a good reputation when used eg. in .300 Lapua Magnum and .30-378 Weatherby Magnum.