9mm or .40 Cal

Discussion in 'Sub9 and Sub2000 Rifles' started by Bullpup777, Jul 12, 2017.

  1. Bullpup777

    Bullpup777 Member

    10
    Mar 20, 2017
    Looking into a Sub2K Gen2. I do not currently own a hand gun and no mags to match to the gun. What calibers do you prefer and why? Thanks!
     
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  2. donutz28

    donutz28 Member

    108
    Jul 22, 2011
    Cost effective plinking? Can't beat availability of 9mm
    Power...40sw

    I would plan on a matching handgun caliber. For example, when the neighbor picked up a 9mm G19 a few years back, her recent s2k G19 choice was a no brainer, especially with G17 and extended 30 round factory Glock mags.
     

  3. gbdeamer

    gbdeamer Active Member

    210
    Jun 1, 2016
    I agree with donutz28 that it would be wise to do some forward thinking and make your decision with a handgun in mind.

    From a practical perspective, buying one caliber of ammunition and one type of magazine that will work with your pistol and the Sub 2000 will be a time, money, and space saver.

    From a tactical perspective it makes a lot of sense to be able to hot swap between pistol and carbine if the need ever arises.
     
  4. bullpup-one

    bullpup-one Active Member

    195
    Oct 6, 2013
    I like the .40 165 gr out of a 16" barrel very effective hit.
     
  5. iamscottasus

    iamscottasus Active Member

    270
    Feb 21, 2014
    These small carbines, I have a Beretta CX4 and SUB2Kgen1, in .40 is fine but I always feel like they would be more pleasant to shoot in 9mm. You usually have more magazine options in 9mm. If I wrer to do it over again, I would buy 9mm
     
  6. bullpup-one

    bullpup-one Active Member

    195
    Oct 6, 2013
    A glock 22, 22 round magazine with a +2 extension is plenty for social discourse.
     
  7. ral357

    ral357 Well-Known Member

    439
    Aug 21, 2015
    There is no best answer. 9mm has the advantage as far as economically feeding the dang thing and in long term durability. Plus 33 round glock mags are readily available for cheap for the Glock 9 variants. The 40 throws a heavier fatter slug and hits a bit harder. Personally for me the nine has the edge. If you can't find ammo for the nine you ain't finding ammo period. Out of the carbine length barrel the 124 grain nine is up to 357 mag pistol with 4" barrel performance. For two legged varmints it's good enough. For paper punching or making cans dance the 9 is good enough. The only area the 40 beats the nine in a carbine IMO is if a bigger threat is possible, bear, and then I'd go much bigger than 9 or 40 but that's another topic.....
     
    Last edited by a moderator: Jul 12, 2017
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  8. iamscottasus

    iamscottasus Active Member

    270
    Feb 21, 2014
    That was my reasoning for buying .40. I already had a .40 HG
     
  9. iamscottasus

    iamscottasus Active Member

    270
    Feb 21, 2014
    +1 and to add to this, since most of your shooting is likely fun shooting, I think the 9mm is much more pleasant on the ol' shoulder. Tactically, I would rather have the quantity advantage of 9mm.
     
  10. Bullpup777

    Bullpup777 Member

    10
    Mar 20, 2017
    Thanks guys for all of your input. Will look at a 9mm s2k. Will also look at 9mm pistols as well. I appreciate your time and advice.
     
  11. Newbe64

    Newbe64 Active Member

    103
    Feb 18, 2006
    Yep, 9 mil for all of the above reasons. I have never been a fan of the 40 though.
     
  12. iamscottasus

    iamscottasus Active Member

    270
    Feb 21, 2014
    I think the .40 is perfect for a pistol, as it fills a gap between .45 and 9mm. But 9mm in a 16" is plenty powerful.
     
  13. MarkCO

    MarkCO Active Member

    182
    Aug 30, 2016
    Colorado
    9mm. Blowbacks are rough on brass and actions. As the pressure and bullet weight goes up, so too does the recoil and wear. There is no good reason to go .40 over 9mm unless you already own a .40.
     
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  14. F16Vet

    F16Vet New Member

    26
    Sep 30, 2011
    Tucson, AZ
    What if you already own both?
     
  15. iamscottasus

    iamscottasus Active Member

    270
    Feb 21, 2014
    when the SHTF you leave the house with the wrong mags & bulitz
     
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  16. MarkCO

    MarkCO Active Member

    182
    Aug 30, 2016
    Colorado
    I do. The .40 caliber Glocks are tucked away, mags and ammo separate and in the back of the mag drawers. Everything 9mm: carry guns, nightstand guns, PCCs (Sub2000s and AR9s), even the carry revolver.
     
  17. iamscottasus

    iamscottasus Active Member

    270
    Feb 21, 2014
    Sorry, i meant to say "boolitz"
     
  18. TNTRAILERTRASH

    TNTRAILERTRASH Active Member

    163
    Aug 27, 2015
    If you get a Glock in .40? Easily converted to 9. Last ammo shortage? .45, and 9 was hard to get. 9 was non existent. (2013) lots of .40. Lots of people are dumping their .40's .

    I am not going to get a .40 Subbie. (no basis in fact) I'm afraid a Keltek .40 would kick itself to pieces. JMO. The 9 should be equivalent to a .357 out of a 16" barrel.
     
  19. RJR573

    RJR573 New Member

    15
    Jun 12, 2013
    Fair Grove, Missouri
    Get one that takes Glock 17 or 19 mags,, cause everyone should own one of those pistols too...
     
  20. TNTRAILERTRASH

    TNTRAILERTRASH Active Member

    163
    Aug 27, 2015
    Glocks. You can be converted down in caliber. Not up. Best all around .40 on Glock is the 23. Same size frame as the 19. I own a 19, and a 23+ 3 others. For a .40 carbine? Wait 'til PSA comes out with a Glock mag compatible upper, or just get a Hi-Point 4095 that takes HP mags.

    I support caliber diversity!;)