.45 Super Question

Discussion in 'Handguns: Autoloaders' started by SwampWolf, Oct 20, 2021.

  1. SwampWolf

    SwampWolf Member

    Joined:
    Sep 18, 2005
    Messages:
    6,491
    Location:
    North Central Ohio
    A good friend of mine is interested in shooting his Glock pistol, chambered in .45 ACP, with the .45 Super cartridge, giving some additional flexibility to the gun. He feels that, because the dimensions of the .45 ACP and the .45 Super cases are the same (but with the Super case having more brass in the base), most, if not all modern pistols chambered in .45 ACP would (should) be compatible and interchangeable with .45 Super ammunition. Is this possible or even feasible let alone practical (he does reload)? I can find nothing in the many reloading manuals I have that address or describe the .45 Super cartridge.
    The ballistic chart in the latest Gun Digest, however, shows the .45 Super to be a much more powerful round than the "standard" .45 ACP. For instance, when comparing bullets weighing 185 grains, the mv of the .45 ACP is rated @ 1,000 fps, while the .45 Super generates 1,300 fps (though the .45 ACP "+P" load produces 1140 fps).
    So my question is, can pistols chambered in .45 ACP safely use .45 Super ammunition (or use it at all) without alteration? Thanks for all responses.
     
    LoonWulf likes this.
  2. barnetmill

    barnetmill Member

    Joined:
    Jun 6, 2006
    Messages:
    1,164
    Is the glock rated or described as being able to shoot the 45 super loading that is loaded to the same as is a is heavy 10mm load? If not I suggest not doing it.
     
    LoonWulf and SwampWolf like this.
  3. The Glockodile

    The Glockodile Member

    Joined:
    May 6, 2020
    Messages:
    485
    If the Muzzle Energies of a full Norma 10mm load and that of .45 Super are comparable, then I’d wager it’d probably be all right...

    You may need different recoil springs to account for the “suboptimal” locking block geometry.
     
    LoonWulf and SwampWolf like this.
  4. JTQ

    JTQ Member

    Joined:
    Apr 6, 2009
    Messages:
    9,103
    Location:
    NW Florida
    On another forum, one of the members spent a bunch of time, effort, and money trying various "heavy hitter" rounds in various semi-auto pistols, so he could avoid carrying a heavy, slow to reload, revolver in a some magnum caliber for his regular time spent in Alaska.

    I believe he found the G21 could handle the .45 Super OK, but he had difficulty getting them to feed typical bullet shapes that he'd need to take advantage of the .45 Super capabilities on big animals. He had the same problems with the G20 with bullet shapes in 10mm, and the G22 with .40 S&W. He is a Glock fan, and shoots them in competition, and wanted them to work to maintain consistency and familiarity.

    He ended up with an HK USP .45 that he found very reliable and plenty durable with the .45 Super. He admits he can't shoot the USP as efficiently as his Glock's, but his desire for the gun had a greater focus on reliability, and durability, rather than shoot-ability.
     
    LoonWulf and SwampWolf like this.
  5. murf

    murf Member

    Joined:
    Nov 16, 2010
    Messages:
    5,283
    Location:
    arizona
    mac just did a video on the 45 super:

    i added a 21 lb. recoil spring and a alpha wolf barrel to my glock 30 and shoot 230 grain xtps @ 1,000 fps as my defense round.

    luck,

    murf
     
    LoonWulf and SwampWolf like this.
  6. Riomouse911

    Riomouse911 Member

    Joined:
    Jun 5, 2013
    Messages:
    6,799
    Location:
    Ca.
    https://www.google.com/amp/s/www.thetruthaboutguns.com/glock-21sf-45super-conversion-1000-rounds-and-bunch-of-pigs-later/amp/


    This guy did a Glock conversion to safely fire .45 Super using a fully supported barrel, 24 lb recoil spring and tungsten guide rod from Lone Wolf.

    Based on other articles I’ve read this relatively inexpensive job creates a reliable shooter.

    My factory-made .45 Super (Springfield V-16 1911) has a very stout recoil spring compared to my other .45 ACP 1911’s, so adding a heavier spring at a bare minimum sure makes sense.

    Stay safe.
     
    LoonWulf and SwampWolf like this.
  7. tark

    tark Member

    Joined:
    Nov 25, 2013
    Messages:
    3,786
    Location:
    atkinson, ill
    Remember your physics, guys! A ten and a 45 loaded to the same pressure levels will result in the 45 beating the gun harder. Why? Larger surface area for that pressure to push against. A 308 has about 10,500 pounds of of thrust against the rifle's locking logs, for a tiny fraction of a second. A .300 Win mag has 14,200. Why the difference? The 308 case has .176 Sq. In. of interior volume for the powder gasses to push against. The 300 has .222 .
     
    LoonWulf and SwampWolf like this.
  8. SwampWolf

    SwampWolf Member

    Joined:
    Sep 18, 2005
    Messages:
    6,491
    Location:
    North Central Ohio
    Thanks for all of the helpful insights, guys. I don't plan on shooting .45 Super ammunition out of my 1911 pistols (currently a Colt Gold Cup and a SIG TTT) but I'm wondering if doing so is feasible and safe, albeit impractical (at least for me). I'm not one who likes to beat a gun to death unnecessarily with "over the top" loads, even if it's safe to do so.
     
    LoonWulf likes this.
  9. LoonWulf
    • Contributing Member

    LoonWulf Contributing Member

    Joined:
    Jul 3, 2010
    Messages:
    14,960
    Location:
    Hawaii
    This is just my opinion.....

    I think your safe to fire a few 45 Super in most full size + production guns that have fully supported chambers with little or no modifications.
    BUT your causing ware at a much faster rate than you would with standard spec ammo.

    Ive built up an XD45 that ran 230-250s at 1250fps. recoil was unpleasant, even with the comp, but slide velocity and ejection werent anymore vigorous than my buddies 10mm Xdm. A couple shots with the comp off launched the brass about 10-15' in the air and landed them 15 or so feet away.

    Running 230s at 1000fps, the comp wasnt necessary, and even with the stock 18lb spring ejection wasnt ridiculous.
     
    murf, SwampWolf and The Glockodile like this.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice