A Colt 1911 pistol fires a .45 ACP caliber bullet. What does ACP stand for?

Answer 1

Automatic Colt Pistol

Answer 2

ACP stands for Automatic Colt Pistol as other have already stated.

There are othe "ACP" cartridges out there as well, besides the .45.

.25 ACP
.32 ACP
.380 ACP

The newest addition would be the .45 GAP, or the "Glock Automatic Pistol" which will NOT fit in a .45 ACP chamber -designed that way for safety reasons.

Answer 3

Auto Colt Pistol

Answer 4

The .45 can simply fire a larger bullet at a high muzzle velocity and achieve good penetration. You could kill a violent intruder in your house at night with a bow or a spear or even a pellet gun- but when you push 230 grains into them and repeatedly, if needed, your likelihood of saving your wife and daughter from being raped and murdered is a lot better. If you want to be technical, there are three highly mass produced automatic pistol calibers larger than the .45 available, and numerous specialty calibers that are larger, not to mention rimmed cartridges. If I have no other choice than to squeeze the trigger on a hostile bad guy, I want to be sure that I can neutralize the threat as efficiently as possible. The 45 is definitely a defense round. The bad guys who commit acts of heinous gun violence almost always choose the smaller calibers of which so many more bullets can be put into the standard magazine.

Answer 5

I know this question has been answered already, but I can't pass up the oppurtunity to post about the .45acp.
ACP stands for Automatic Colt Pistol. Revolver cartridges have rims at their bases that holds them in the cylinder and allows the extractor to easily eject them. Automatic pistol cartridges are rimless to better fit into magazines.
We 1911 fans never miss a chance to talk about those classic guns.

Answer 6

The US Cavalry had been buying and testing various handguns in the late 1890s and early 1900s. The .45 Colt Single Action Army had largely been replaced, even by some double action versions of the same. The Cavalry had fielded some double action revolvers in .38 Long Colt, and they determined that the .38 caliber round was significantly less effective against determined opponents, such as those encountered in the Moro Rebellion warriors they were fighting at the time, than the .45 Colt. The current issue rifle at the time, the .30-40 Krag, also had failed to stop Moro warriors[1]; the British had similar issues switching to the .303 British, which resulted in the development of the Dum-dum bullet. This experience, and the Thompson-LaGarde Tests of 1904 led the Army and the Cavalry to decide that a minimum of .45 caliber was required in the replacement handgun.

Colt had been working with Browning on a .41 caliber cartridge in 1904, and in 1905 when the Cavalry asked for a .45 caliber equivalent Colt modified the pistol design to fire a .45 caliber version of the prototype .41 caliber round. The result from Colt was the Colt Model 1905 and the new .45 ACP. The original round that passed the testing fired a 200 grain (13 g) bullet at 900 ft/s (275 m/s), but after a number of rounds of revisions between Winchester Repeating Arms, Frankford Arsenal, and Union Metallic Cartridge, it ended up using a 230 grain (15 g) bullet at about 850 ft/s (260 m/s). The resulting .45 caliber cartridge, named the .45 ACP, is similar in performance to the .45 S&W cartridge, and only slightly less powerful (but significantly shorter) than the .45 Colt cartridges the Cavalry was using. The cartridge case shared the same head dimensions as the .30-03 and later .30-06 rifle cartridges in use by the military at the time.

By 1906 bids from 6 makers were submitted, among them Browning's design, submitted by Colt. Only DWM, Savage, and Colt made the first cut. DWM, which submitted two Luger pistols adapted to the .45 ACP cartridge, withdrew from testing after the first round of tests, for unspecified reasons.[2] One of the DWM pistols, serial number 1, was destroyed in testing; the remaining instance, serial number 2, is considered one of the most desirable collectors handguns in existence[3].

In the second round of testing in 1910, the Colt design passed the extensive testing with no failures, while the Savage design suffered 37 stoppages or parts failures.[4] The resulting design was adopted as the Model 1911.

Answer 7

ACP, as in .45 acp, is an acronym for: Automatic Colt Pistol.

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Answer 8

ACC stands for Colt Combat Commander.... ACP stands for Automatic Colt Pistol..........

Answer 9

"Automatic Colt Pistol "colt designated several rounds like this32acp is another.Basically if you developed the cartridge you get to name it. 45 GAP 45 Glock Automatic Pistol is another named cartridge that is fairly recent

Answer 10

"Automatic Colt Pistol"

Means the round was developed for use in auto-loading (originally) Colt pistols.