Ramshot powders are double-based, spherical-shaped, smokeless powders that meter easy, burn clean and produce high velocities. Excellent lot-to-lot consistencies for repeatable accuracy between loads. Silhouette is a flat, spherical powder that's extremely clean burning with a low flash signature making it ideal for indoor ranges and law enforcement use. Performs well in 9mm, .38 Super, .357 Sig, and 10mm.