45 ACP Ammo For Sale | 45 Auto Ammunition

Power and Tradition
Why shoot a .45 ACP? The .45 ACP cartridge has been relied on by U.S. military and law enforcement officers for more than 100 years. Cheaper Than Dirt! has the ammo in stock to feed your .45 ACP firearm. Browse our wide selection of .45 auto ammunition today, and stock up for your next trip to the range. Whether you’re looking for light plinking loads or hot defense rounds, we’ve got you covered with high-quality ammunition. Train with .45 ACP ammo like a professional and protect your family like a professional.

The . 45 ACP cartridge has a very slight taper, some 0.003” from case head rim to case mouth, so it can be considered a straight case for feeding purposes. The cartridge has changed only in the adoption of non-corrosive primers and different powder formulations in the mid-1950s, and it was known as “Cartridge, Ball, M1911, Cal. 45” for its entire military service life.

In the civilian world however, it has remained as popular as ever. Due to the existence of new generation jacketed hollow point bullets, it still retains its terminal ballistic advantages of expansion and consistent penetration compared to smaller bore diameter offerings. A recent detailed study indeed illustrated that the Federal HST 230gr standard pressure rounds offer 16” of penetration and consistent 0.85” of controlled expansion with no bullet fragmentation in an unofficial “FBI heavy clothing test” into simulated ballistic gelatin.

Different Types of .45 ACP Ammunition

Like other cartridges, the .45 ACP is available in a range of different types and styles. Some of the most common .45 Auto ammo includes:

  • Full metal jacket (FMJ): .45 FMJ ammo features a lead bullet encased with a copper or other hard metal coating, helping the bullet keep its form until impact. People sometimes refer to these cartridges as full metal case (FMC) ammo.
  • Jacketed hollow point (JHP): .45 ACP JHP ammo also has a lead bullet encased in a hard metal, but instead of a round ball, the bullet has a hollow point inside – which makes it expand on impact, increasing its stopping power.
  • Advanced energy transfer (AET): AET ammo, also called frangible ammunition, looks like standard ammo, but when it hits its target, this bullet fragments into tiny pieces of composite materials (as long as the target is harder than the bullet).
  • Total metal jacket (TMJ): Much like the FMJ, the TMJ features a bullet completely covered in a hard metal. The difference between the two is that FMJ ammo exposes a small amount of lead at the base of the bullet, but TMJ completely covers the bullet – minimizing the shooter’s lead exposure.

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As a hunting cartridge, the .45 ACP is, well, less than ideal, yet I know those who have used it successfully for deer-sized game at close ranges. In my personal opinion, there are better choices for a hunting handgun cartridge.

The .45 ACP has long been a military darling—though in recent years it was replaced by the 9mm Parabellum as the Army’s issued sidearm—and the debates continue regarding the 9mm/.40 S&W/.45 ACP conundrum. I’ve long been a heavy bullet fan, especially when it comes to handguns, and I believe that all things being equal, if a shooter can effectively handle the .45 ACP, he or she would be well-served by carrying one.

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Why is the .45 ACP So Popular?

The .45 ACP grew in popularity outside of the Armed Forces due to its ability to adapt to a variety of shooting applications, including sport shooting, law enforcement, and self defense. Both target shooters and backyard shooters appreciate the .45 ACP for its accuracy, mild recoil, and heavy bullet.

Law enforcement agencies have chosen the .45 ACP for its proven ability to stop dangerous aggressors. Units such as the FBI’s Hostage Rescue Team and the Los Angeles Police Department SWAT, as well as other specialized units, carry firearms chambered in the .45 Auto.

.45 acp ammo

The U.S. military officially replaced the .45 ACP with the 9mm in 1985, though it continues to have pockets of dedicated users in the service. Operators of the Marine Expeditionary Units, Delta Force and others within the purview of the United States Special Operations Command have the option of using pistols chambered in the .45 ACP.

As a self-defense weapon, in its basic full metal jacket (FMJ) cartridge, the non-expanding .45 Auto is heavy and penetrates deep. The large bullet diameter creates a significant wound, which can damage the central nervous system, circulatory system, and critical organs. Those looking for personal protection may also opt for specialty configurations from a variety of ammunition manufacturers including Hornady, Federal, and Magtech.

Another reason that contributes to the .45 Auto’s popularity is its affordability.

Bulk .45 acp ammo

Why is the .45 ACP So Popular?

The .45 ACP grew in popularity outside of the Armed Forces due to its ability to adapt to a variety of shooting applications, including sport shooting, law enforcement, and self defense. Both target shooters and backyard shooters appreciate the .45 ACP for its accuracy, mild recoil, and heavy bullet.

Law enforcement agencies have chosen the .45 ACP for its proven ability to stop dangerous aggressors. Units such as the FBI’s Hostage Rescue Team and the Los Angeles Police Department SWAT, as well as other specialized units, carry firearms chambered in the .45 Auto.

The U.S. military officially replaced the .45 ACP with the 9mm in 1985, though it continues to have pockets of dedicated users in the service. Operators of the Marine Expeditionary Units, Delta Force and others within the purview of the United States Special Operations Command have the option of using pistols chambered in the .45 ACP.

As a self-defense weapon, in its basic full metal jacket (FMJ) cartridge, the non-expanding .45 Auto is heavy and penetrates deep. The large bullet diameter creates a significant wound, which can damage the central nervous system, circulatory system, and critical organs. Those looking for personal protection may also opt for specialty configurations from a variety of ammunition manufacturers including Hornady, Federal, and Magtech.

Another reason that contributes to the .45 Auto’s popularity is its affordability.

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