scd asked in SportsOutdoor RecreationHunting · 1 decade ago

What is the difference between a glock 45 acp and a glock 45 gap?

5 Answers

  • Anonymous
    1 decade ago
    Favorite Answer

    45ACP and 45 GAP are two different cartridges.

    the 45ACP was invented by John Moses Browning for Colt back in 1904, to match the performance of the famous 45 Long Colt in a semiauto pistol. It fires a 45 caliber bullet, using a 23mm long case, and is 1.28 inches long overall

    9mm came along and got very popular, it has an overall length of 1.16, and then 40 S&W (what many ignorant people call 40 cal ) came along with a 1.13 overall length.

    you could take the same gun design and fit the S&W 40 or the 9mm in it with very little change. But to get the 45ACP to fit, you had to design the magazine and grip around it.

    Glock wanted to be able to have a 45 that was in the same gun as 40SW and 9mm without any sort of rework. So they invented the 45 GAP with an overall length of 1.08.

    the 45 ACP is an old round, and was made considering 1904 technology and was designed to operate around 21,000 PSI. Both 9mm and 40SW run at 35,000 PSI. In the 1960's "+P" high pressure loads that used 23,000 PSI came out for the 45, but you really couldn't go all the way up to 35,000 without at least a few new parts in the gun.

    Glock figured if they build for a bit higher pressures from the get-go they'd be able to duplicate the 45 ACP performance in a smaller package.

    They were partly right and partly wrong. With 185 grain bullets the 45 GAP is VERY CLOSE to standard 45 ACP loads. Note, however, that for most serious defensive rounds people have switched to +P 45ACP, and the GAP cannot match that. Most folks use regular 45 ACP for paper punching, where GAP's ability to match the power is irrelevant.

    Further, 185 is about the lightest 45acp bullet you are likely to find in defensive loads. (some specialty light recoil loads use 165 as do some target loads) Lots of loads use 200 grain bullets, and plenty use 230 grain bullet. Because cartridges have an overall length they cannot exceed, these heavier bullets fit more deeply into the case. For the 45 ACP this is no problem, but for the 45 GAP, this means precious space is used up. The 45 GAP is hindered by a 200 grain bullet, and is absolutely crippled by a 230 grain bullet.

    And the guys who run standard pressure 45ACP loads for defense generally use the 230 grain bullets.

    This means that while advertisements for the 45GAP can honestly say it 'matches the performance of 45ACP' it is only a half-truth, because it only matches 45 ACP performance with target loads, not for serious defense loads.

    So what happens if you bump the pressure of the 45ACP higher? That has happened and the resulting round is named the 45 "super" which has the same outside dimensions as the 45 ACP but thicker case walls, allowing it to be run at 28,000 PSI

    MV = Velocity measured at the Muzzle

    fps = feet per second

    45 GAP using a 230 grain bullet has a MV of 830 fps, for 352 ft-lbs energy

    "Standard" 45 ACP using a 230 grain bullet has a MV of 880 fps for 395 ft-lbs energy

    45ACP +P using a 230 gran bullet has a MV of 1020 fps, generating 530 ft-lbs of energy

    45 SUPER using a 230 grain bullet has a MV of 1200 fps, for 738 ft-lbs of energy

    Note, most 45 supers are currently loaded for 1100 fps, it does less wear and tear on the gun but still produces the very impressive 620 ft-lbs of energy

    But the baddest boy on the block, the 460 Rowland runs at 35,000 psi

    460 Rowland using a 230 grain bullet has a MV of 1340 fps, for 917 ft-lbs of energy.

    However, most 460 Rowland loads generate 1250 fps, giving them a little bit of margin for error, generating right at 800 ft-lbs of energy.

    For comparison, most 'self defense' type 44 magnum loads generate about 750 ft-lbs of energy and most hunting 44 magnum loads generate about 950 ft-lbs of energy, the 460 Rowland is right up there with it.

  • Anonymous
    1 decade ago

    The 45 GAP was made by Glock to make a smaller framed gun (about the size of a 9mm frame). Basically a shorter 45 ACP with the casing.

    That is the simple answer. If you get a Glock I highly recommend one by the way just go with the 45 ACP. It's more readily available and more common.

    Source(s): me gun owner glock owner.
  • ERIC
    Lv 6
    1 decade ago

    the cartridge used.

    The .45 gap is basically a shortened down .45 acp

    as autoloading pistols headspace on the case mouth the 2 are not interchangeable.

    the .45 gap was invented a few years ago by Glock to make a .45 that's easier to conceal, since the magazine and therefore grip can be shorter so the pistol can be made smaller.

    .45 acp ammo is one of the most common out there .45 gap ammo can be a bit harder to find and likely will cost more due to much less of it being produced

  • 1 decade ago

    Short answer: The GAP is a new(er) cartridge designed for/by Glock. It is roughly the same size case as a 9mm, but larger in diameter (thus .45 GAP). The point was to make a smaller .45 cartridge. It has been slow to catch on in a big way, and the ammo is somewhat difficult to find and more expensive.

    A 'special' round that actually improved performance is the .357 SIG, which is an auto round, although its also more expensive & hard to find.

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  • Maria
    Lv 4
    4 years ago

    Guru is an idiot! The 21 is a better choice for the simple reason that ammunition for 45 auto is abundant and easy to locate. Glock wasted a lot of time and money developing the GAP. I don't think it will be around for a whole lot longer, unlike the tried and true 45 auto.

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