john i have been using this for 3 years now at the beginning of this year i bought a chronograph cause some people thought it was not safe so to begin with hodgdon does not recommend this load and i will not recommend it. i use this with a 357 magnum ruger gp100 4 inch barrel winchester small magnum primers 180 grain striker from missouri bullet company i tested with a chronograph at 6.7-6.8 grains of longshot powder at 1050 to 1100 velocity 100 rounds fired very little leading. i also shoot this out of an h&r 357 rifle ruger 357 rifle with no problems have reloaded brass 5-6 times this is a very accuate load 2000 rounds fired but i still can not recommend it use at your own risk i highly recommend it for myself. i hope this helps you out