There's hardly any data available for this pistol powder. I was told that it was developed for the 9 mm military ammo. In 9 mm I use this with 5.0 grains of powder. With a 128 grain powder coated cast bullet seated to about 1.148 oal. Works well with multiple pistols. This is a compressed load. Have not chronoed yet. From what I have seen most people who use this powder believe this is about standard for this weight of bullet. My mold is supposed to be 124 grain. But it drops at 128 grains.
As to the .357 mag I found virtually nothing. So I started with a 158 grain cast powder coated bullet. Based on the burning rate I decided that I would start with 6 grains in a .357 mag casing with a small pistol magnum primer. I was measuring powder charges and then I switched to a Lee dipper 1.0 cc size and it was getting very close to 6.0 grains every time. So if you use these 1.0 is a good start my case oal is 1.6 and is almost a compressed load. I tested these in a 4 inch s&w revolver. These felt a little stronger than a 38 spl load. I haven't had a chance to chrono this yet. But was a very nice target load. Will report when I chrono them . And I may try 6.4 grains next time.
As to the .357 mag I found virtually nothing. So I started with a 158 grain cast powder coated bullet. Based on the burning rate I decided that I would start with 6 grains in a .357 mag casing with a small pistol magnum primer. I was measuring powder charges and then I switched to a Lee dipper 1.0 cc size and it was getting very close to 6.0 grains every time. So if you use these 1.0 is a good start my case oal is 1.6 and is almost a compressed load. I tested these in a 4 inch s&w revolver. These felt a little stronger than a 38 spl load. I haven't had a chance to chrono this yet. But was a very nice target load. Will report when I chrono them . And I may try 6.4 grains next time.
