Winchester ammunition is a moderately heavy 180 grain, which lends some oomph to its muzzle energy of 408 foot-pounds. But don’t think it isn’t still fast, because it is, with a muzzle velocity of 1,010 feet per second. And it’s JHP, so it’s well-suited for your self-defense needs. 50 rounds come packaged in this box, so you can load a few mags for self-defense or put it in your safe for future use. .40 S&W is a solid round, and when you combine its hitting power with the rich history and experience of Winchester, you know you’re on the right track to covering your self-defense bases