45 Auto (ACP) Ammo

An iconic American cartridge, the .45 ACP was popularized in John Browning’s classic Colt Model 1911 pistol. Today it remains as popular as ever – with military, police and civilian shooters continuing to make this cartridge their choice for personal protection. Learn More

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  1. Hornady Critical Duty 45 +P Auto Ammo - 200 Rounds of 220 Grain JHP Ammunition

    5 In stock now

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    Image For 200 Rounds Of 220 Grain JHP Boxer Nickel-Plated Brass 45 Auto Hornady Ammunition
    $204.99 Price

    Qty:

    • 200 Rounds
    • Made by Hornady

    • New Condition
    • 200 Rounds
    • Made by Hornady
    • American-made Self-Defense
    • $1.02 to $1.03 Cost Per Round
    • Hornady SKU 90926
    • UPC 10090255909262
  2. Winchester W Train & Defend 45 Auto Ammo - 20 Rounds of 230 Grain JHP Ammunition

    40 In stock now

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    Image For 20 Rounds Of 230 Grain JHP Boxer Nickel-Plated Brass 45 Auto Winchester Ammunition
    $20.50 Price

    Qty:

    • 20 Rounds
    • Made by Winchester

    • New Condition
    • 20 Rounds
    • Made by Winchester
    • American-made Discount Defense
    • $1.03 Cost Per Round
    • Winchester SKU W45D
    • UPC 020892221659
  3. Hornady 45 Auto Ammo - 200 Rounds of 185 Grain JHP Ammunition

    2 In stock now

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    Image For 200 Rounds Of 185 Grain JHP Boxer Nickel-Plated Brass 45 Auto Hornady Ammunition
    $209.99 Price

    Qty:

    • 200 Rounds
    • Made by Hornady

    • New Condition
    • 200 Rounds
    • Made by Hornady
    • American-made Self-Defense
    • $1.05 Cost Per Round
    • Hornady SKU 90900
    • UPC 10090255909002
  4. Magtech 45 ACP +P Ammo - 20 Rounds of 165 Grain SCHP Ammunition

    17 In stock now

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    Image For 20 Rounds Of 165 Grain JHP Boxer Nickel-Plated Brass 45 Auto Magtech Ammunition
    $22.50 Price

    Qty:

    • 20 Rounds
    • Made by Magtech

    • New Condition
    • 20 Rounds
    • Made by Magtech
    • Foreign-made Self-Defense
    • $1.13 Cost Per Round
    • Magtech SKU FD45A
    • UPC 754908184514
  5. Hornady 45 Auto Ammo - 20 Rounds of 185 Grain JHP Ammunition

    41 In stock now

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    Image For 20 Rounds Of 185 Grain JHP Boxer Nickel-Plated Brass 45 Auto Hornady Ammunition
    $22.99 Price

    Qty:

    • 20 Rounds
    • Made by Hornady

    • New Condition
    • 20 Rounds
    • Made by Hornady
    • American-made Self-Defense
    • $1.15 Cost Per Round
    • Hornady SKU 90900
    • UPC 090255909005
  6. Hornady Duty Defense 45 Auto +P Ammo - 20 Rounds of 220 Grain FTX JHP Ammunition

    46 In stock now
    Image For 20 Rounds Of 220 Grain JHP Boxer Nickel-Plated Brass 45 Auto Hornady Ammunition
    $22.99 Price

    Qty:

    • 20 Rounds
    • Made by Hornady

    • New Condition
    • 20 Rounds
    • Made by Hornady
    • American-made Self-Defense
    • $1.15 Cost Per Round
    • Hornady SKU 90926
    • UPC 090255909265
  7. Winchester 45 Auto Ammo - 20 Rounds of 185 Grain JHP Ammunition

    5 In stock now

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    Image For 20 Rounds Of 185 Grain JHP Boxer Brass 45 Auto Winchester Ammunition
    $23.00 Price

    Qty:

    • 20 Rounds
    • Made by Winchester

    • New Condition
    • 20 Rounds
    • Made by Winchester
    • American-made Self-Defense
    • $1.15 Cost Per Round
    • Winchester SKU X45ASHP2
    • UPC 020892201675
  8. Barnes TAC-XPD 45 Auto Ammo - 20 Rounds of +P 185 Grain SCHP Ammunition

    37 In stock now
    Image For 20 Rounds Of 185 Grain JHP Boxer Nickel-Plated Brass 45 Auto Barnes Ammunition
    $23.00 Price

    Qty:

    • 20 Rounds
    • Made by Barnes

    • New Condition
    • 20 Rounds
    • Made by Barnes
    • American-made Self-Defense
    • $1.15 Cost Per Round
    • Barnes SKU 21555
    • UPC 716876145010
  9. Winchester 45 Auto Ammo - 20 Rounds of 230 Grain JHP Ammunition

    29 In stock now
    Image For 20 Rounds Of 230 Grain JHP Boxer Nickel-Plated Brass 45 Auto Winchester Ammunition
    $23.50 Price

    Qty:

    • 20 Rounds
    • Made by Winchester

    • New Condition
    • 20 Rounds
    • Made by Winchester
    • American-made Self-Defense
    • $1.18 Cost Per Round
    • Winchester SKU S45PDB
    • UPC 020892217898
  10. Black Hills Ammunition 45 Auto +P Ammo - 20 Rounds of 185 Grain Barnes TAC-XP HP Ammunition

    7 In stock now

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    Image For 20 Rounds Of 185 Grain JHP Boxer Brass 45 Auto Black Hills Ammunition Ammunition
    $24.50 Price

    Qty:

    • 20 Rounds
    • Made by Black Hills Ammunition

    • New Condition
    • 20 Rounds
    • Made by Black Hills Ammunition
    • American-made Self-Defense
    • $1.23 Cost Per Round
    • Black Hills Ammunition SKU D45N720
    • UPC 612710128778
  11. Speer 45 Auto Ammo - 20 Rounds of 230 Grain JHP Ammunition

    21 In stock now

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    Image For 20 Rounds Of 230 Grain JHP Boxer Nickel-Plated Brass 45 Auto Speer Ammunition
    $24.99 Price

    Qty:

    • 20 Rounds
    • Made by Speer

    • New Condition
    • 20 Rounds
    • Made by Speer
    • American-made Self-Defense
    • $1.25 Cost Per Round
    • Speer SKU 23966
    • UPC 076683239662
  12. Federal 45 Auto Ammo - 20 Rounds of 165 Grain Expanding FMJ Ammunition

    16 In stock now

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    Image For 20 Rounds Of 165 Grain Expanding FMJ Berdan Steel 45 Auto Federal Ammunition
    $24.99 Price

    Qty:

    • 20 Rounds
    • Made by Federal

    • New Condition
    • 20 Rounds
    • Made by Federal
    • American-made Self-Defense
    • $1.25 Cost Per Round
    • Federal SKU PD45GRD
    • UPC 029465062682
  13. Speer 45 Auto Ammo - 20 Rounds of 185 Grain JHP Ammunition

    16 In stock now

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    Image For 20 Rounds Of 185 Grain JHP Boxer Nickel-Plated Brass 45 Auto Speer Ammunition
    $26.50 Price

    Qty:

    • 20 Rounds
    • Made by Speer

    • New Condition
    • 20 Rounds
    • Made by Speer
    • American-made Self-Defense
    • $1.33 Cost Per Round
    • Speer SKU 23964
    • UPC 076683239648
  14. Speer 45 Auto Ammo - 20 Rounds of 230 Grain JHP Ammunition

    14 In stock now

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    Image For 20 Rounds Of 230 Grain JHP Boxer Nickel-Plated Brass 45 Auto Speer Ammunition
    $26.50 Price

    Qty:

    • 20 Rounds
    • Made by Speer

    • New Condition
    • 20 Rounds
    • Made by Speer
    • American-made Self-Defense
    • $1.33 Cost Per Round
    • Speer SKU 23975
    • UPC 076683239754
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Designed by John Moses Browning as a replacement for the "less than stellar" .38 Long Colt cartridge for the U.S. military, the .45 ACP was introduced in 1905. Originally, the .45 ACP had a 200 grain bullet that traveled 900 feet per second. But along with the M1911 pistol, the .45 ACP cartridge was tested by the U.S. Army over the next six years, where both the ammo and the firearm were modified. The bullet weight was increased to 230 grains without a change in the powder load, so muzzle velocity for this new bullet dropped to 830 feet per second – which remained the standard load for its service life.

Sgt. Alvin York in World War I used his .45 ACP to singlehandedly kill six German soldiers while assaulting their machine gun emplacements, supporting the claim of the cartridge as an excellent man stopper. While his story is one of the more famous, other Medal of Honor recipients besides York used the .45 ACP. And since being adopted in 1911 by the military, at least 68 awardees of the Medal of Honor have carried the .45 ACP and the M1911 pistol in the course of their heroic actions.

The .45 ACP is used outside of the Armed Forces in a plethora of applications that include sport shooting, law enforcement and self defense. Target shooters appreciate the .45 ACP for its accuracy, mild recoil and heavy bullet. Major ammunition manufacturers produce .45 ACP in specialty configurations just for personal protection – including Hornady, Federal and Magtech.

Law enforcement agencies that have chosen the .45 ACP for its proven ability to effectively stop dangerous aggressors include the FBI’s Hostage Rescue Team, the Los Angeles Police Department SWAT, and other specialized law enforcement units. The U.S. military officially replaced the .45 ACP with the 9mm in 1985, though it continues to find 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.

The .45 ACP, after more than a century of use, is a cartridge that has been modified and studied extensively, and is used all over the world. Today, it remains one of the most prized cartridges on the market.

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