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To: DCBryan1

I concur on the “good shooting” but what is a .45 ACP?


2 posted on 01/06/2011 7:59:37 AM PST by samtheman
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To: samtheman

“I concur on the “good shooting” but what is a .45 ACP?”

A .45 ACP is a .45 caliber Automatic Colt Pistol. OFten it is a 1911 model, like those issued to soldiers for many decades.


5 posted on 01/06/2011 8:03:50 AM PST by Oldpuppymax
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To: samtheman
I concur on the “good shooting” but what is a .45 ACP?


14 posted on 01/06/2011 8:17:55 AM PST by Iron Munro ("Damn it, Jim! I'm a doctor - not a Community Organizer!")
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To: samtheman
.45 ACP is a handgun and carbine cartridge that dates back to the beginnings of the 20th century. It has a head diameter of .475, a case length of 0.9 inches, and a bullet diameter of .452 (nearly half an inch). The military spec bullet weight is 230 grains, but commercial loadings and handload recipes can be found with bullet weights ranging from 175 to 250 grains.

The .45 ACP does well with either jacketed or cast bullets. SAAMI spec pressure is 18,000 psi, and typical velocities from a full-sized (1911A1 or equivalent) pistol are around 800 fps.

Although the .45 ACP cartridge was developed with semi-automatic weapons in mind, and has been used in full-auto applications (most notably the Thompson submachine gun), it has also been adapted for use in revolvers. Circular "moon clips" are commonly used for .45 ACP in revolver applications because the .45 ACP case is rimless, having an extractor notch in lieu of a rim. The use of .45 ACP in revolvers dates to WWI, when gun makers supplying materiel for the war in Europe found that they could turn out many more revolvers faster and less expensively than the Colt 1911. Hence the S&W and Colt models 1917 were born.

Curiously, the .45 ACP shares its head dimensions with the .30-06 family of rifle cartridges. This is because when the cartridge was first proposed for military trials, the sample cases that gun manufacturers were given were in fact .30-06 cases, sawed off to an inch in length.

In military trim the .45 ACP is known to be highly effective. Premium anti-personnel loadings are available for civilian use, notably the Federal Hydra-Shock ammunition with 185-grain jacketed hollow-point bullets.

Above: Mil-spec .45 ACP cartridge with jacketed "ball" bullet.

26 posted on 01/06/2011 8:25:16 AM PST by Oberon (Big Brutha Be Watchin'.)
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To: samtheman

A REAL MAN’s caliber! Not like these modern WUSSY ASS 9 mils.


63 posted on 01/06/2011 11:06:56 AM PST by US Navy Vet
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