The Remington UMC Brass Cased Handgun Ammunition .357 SIG 180 gr JHP has a muzzle velocity of 1350 FPS, and muzzle energy of 506 ft lbs. The case mouth and the primer are all waterproofed, which offers you maximum reliability. All of the cases are plated in nickel so that you reduce oxidation, improve your feeding, and improve your extraction. Each bullet is specially treated with powders to reduce muzzle flash each time you shoot.