.40

10mm: A larger and faster round, with similar bullet weight (sometimes heavier if 200gr+ ammo) compared to .40. In average ccw sized guns (say 4" barrel or less), the ballistics can be strikingly similar compared to .40, but generally more penetration and expansion. Also, more RECOIL, and...

.45 ACP: It works because of the sheer size of the round. It doesn't need to expand to be potentially effective. In smaller guns, .45 often doesn't expand, until you reach like a 4.5"+ barrel. When it does expand, expansion is large, and penetration is decent as well. .Velocity is low...

Ammo: Winchester Defender Bonded 180 Grain JHP (Test results from a M&P40C 3.5" Barrel) Gun: Glock 22 (4.49" Barrel) In your opinion, what is the % chance that just 1 shot from .40, through the heart, with THIS SPECIFIC ammo and sized gun, will do the job? No matter how big the person is...

9mm/The King: Adequate ballistics for self-defense use with quality Hollow Points, which are plenty. Best capacity, the variety of gun size options, recoil is mild (depending on size of gun). .40/The Optimal Powerhouse: This is the best go-to if what you desire is best firepower. Big expansion...

My younger brother shoots .40 S&W through his 10mm. I still think he's crazy but he's been doing it for awhile. Does anyone else do this?

If you could have just one pistol in 40 S&W, which would you choose? Do not overthink this. Whatever the situation is, you can have just one pistol in 40 S&W. You have your whole collection of guns. You can swap it for another and buy more guns. Assume that the limit is not legal, but for some...

I've liked the idea of the PC Carbine since they came out, but was holding out for a .40 or .45. Finally, when SHOT passed this year with no mention of new models, I bought a 9mm and was happy with it.... until today, when Ruger announced 6 new models including 3 chambered in .40...

Hey Folks, I am thinking about adding a new caliber to my reloading setup. I've been having a great time shooting thew hell out of my revolvers but I think it's time to start loading for my autos. Specifically my Sig p229 in .40 S&W. I have a bunch of Accurate #2 around. I have been loving it...