I have a program, based on Powley computations, that requires powder densities to calculate load volume. The powders I need densities for are H4198, Vihtavuori N120, and Vihtavuori N110. I have a 4cc measure which I filled with each of these powders and then weighed the powder and got the following results: 55 grains(13.75/cc), 56 grains(14/cc), and 52 grains(13/cc) repectively. These do not jive with any information that I have seen. Does anyone know the actual grains / cc of these powders? Thanks in advance for your help. edge.