I loaded some 357 mag loads with a .5cc dipper of 231 which is around 6 grains and topped them off with 158 gr copper plated bullets. I seated them to right at the crimp groove then used the 4th die in the lee set to crimp it. The manual lists a load for 158 gr lead at around 1100 to 1180 fps which is what I loaded it to. The lee manual didn't list a 231 load for plated just lead so i used that. These are my first handloads and i have yet to shoot them so i just want to make sure i am doing it right.