I've loaded a large amount of it in 9mm and 380, very little in 10mm, It might be a tad rapidly for my favored velocities in 10mm, in all probability a good selection for midrange/SD loads. Posts: 26 Noylj, that is certainly a very good position! There are so many https://handloadingsupply.com/product/572-winchester-smokeless-powder-1-lb/