Here is a shot in the dark. I ran across a discussion and what was said was that Hornady uses a certain Vihtavuori powder in their light mag loads. Does anyone know about the light mag loads from Hornady and what they use for powders. It seems they can get better velocities from their light mags than can a number of handloaders on here and what they can get. Most guys that I have talked to about certain loads can't even come close to the performance of the light mags.