For excellent uniformity and velocity it is hard to beat Alliant Power Pro 300-MP. This smokeless powder is manufactured to extremely high standards and undergoes constant checks and tests in a special ballistics laboratory for size and shape of grain overall density and composition of chemical.This spherical powder is specially designed for calibers of magnum pistols and can deliver better density as well as velocity that makes it easier to meter. With the design for certain applications and cartridges this powder makes it easier for people who reload to create a load very close to ammunition from the factory.