I'm considering assembling the following .357 magnum load. They would be fired through a Ruger New Model Blackhawk 4 5/8" barrel chambered in .357 magnum. Remington .357 magnum cases, Winchester 158 grain JHP bullets, Winchester small pistol primers, 14.0 grains of Alliant 2400 powder. Will this load be safe in the above named revolver? Any guestimate of velocity? Any other good load suggestions using 2400 and the 158 grain JHP? Thanks to all for their help!