Why a .40 S&W Works Better with a 165 gr Bullet

Discussion in 'Ammo, Reloading & Accessories' started by Willjr75, Nov 24, 2017.

  1. Willjr75

    Willjr75 .338 Win Mag U.S. Military

    8,490
    6,726
    178
    I ran into this article on the .40 S&W after researching why there is no +P rated ammo by SAAMI. It's pretty interesting. In a nutshell the article states that due to the short case most 180 gr bullets are too long and are downloaded (watered down) to accommodate variances in manufacturing and not make overpressure. With a 165 gr bullet, there is more space in the cartridge to were they have more to work with and you end up getting Full Powered loadings in regards to powder.

    CALIBERS -- Why the 180gr Bullet is a Bad Choice for .40 S&W
     
  2. Darth

    Darth .338 Win Mag

    8,225
    8,720
    178
    Or extend the case.

    IYKWIM. :rolleyes:
     
    dsdmmat and Willjr75 like this.
  3. dsdmmat

    dsdmmat Donut Master Monthly Shot Winner

    3,471
    4,226
    178
    I find the 170 grain lead TC rounds work well on targets. They don't seem to move after being shot.
     
  4. hoodfu

    hoodfu 9mm

    79
    65
    38
    It’s why I use 135 grain bullets in 40 and 10mm. 14 grains of Alliant 2400 powder brightens even the darkest day.
     
    Wolfspotter likes this.
  5. gun_slinger_boy

    gun_slinger_boy .223 Rem

    1,264
    1,378
    148
    Shorter and lighter bullets can be loaded hotter. Makes sense. But this is the case with every caliber. More case capacity = more powder.
     
  6. Edwardteach72

    Edwardteach72 .357 mag

    651
    386
    78
    Agreed, maybe we should get ammo and gun people in on this idea, oh hey we could have an actually useful round
    Let's call it idk just slit balling here hnmmmmmm oh I got it. "10mm"
     
  7. Wolfspotter

    Wolfspotter 22lr

    16
    5
    3
    I don't have a 40 but do shoot & reload 9mm & 45acp. I'll have to give 2400 a try. I usually use Blue Dot or Long Shot & magnum primers.
     
  8. hoodfu

    hoodfu 9mm

    79
    65
    38
    Yeah, you’ll need a magnum primer to set off 13-14 grains of 2400. A regular large pistol primer is enough, but a regular small pistol primer isn’t. It’ll send the bullet down range but it won’t cycle a semi-auto.
     
Loading...

Share This Page