40 Cal (S&W) Ammo

The .40 Smith & Wesson is a leading cartridge among law enforcement organizations in America, and is often seen as a compromise between the capacity of the 9mm and the power of the .45. It is also popular among civilians for personal protection and sport shooting. Learn More

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  1. Winchester 40 Cal Ammo - 20 Rounds of 180 Grain JHP Ammunition

    31 In stock now

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    Image For 20 Rounds Of 180 Grain JHP Boxer Nickel-Plated Brass 40 Cal Winchester Ammunition
    $22.99 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 W40SWD
    • UPC 020892220577
  2. Federal 40 Cal Ammo - 20 Rounds of 180 Grain HST JHP Ammunition

    53 In stock now

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    Image For 20 Rounds Of 180 Grain JHP Boxer Nickel-Plated Brass 40 Cal Federal Ammunition
    $22.99 Price

    Qty:

    • 20 Rounds
    • Made by Federal

    • New Condition
    • 20 Rounds
    • Made by Federal
    • American-made Self-Defense
    • $1.15 Cost Per Round
    • Federal SKU P40HST1S
    • UPC 029465063931
  3. Magtech 40 cal Ammo - 20 Rounds of 130 Grain SCHP Ammunition

    2 In stock now
    Image For 20 Rounds Of 130 Grain JHP Boxer Nickel-Plated Brass 40 Cal Magtech Ammunition
    $23.00 Price

    Qty:

    • 20 Rounds
    • Made by Magtech

    • New Condition
    • 20 Rounds
    • Made by Magtech
    • Foreign-made Self-Defense
    • $1.15 Cost Per Round
    • Magtech SKU FDJ40A
    • UPC 754908197514
  4. Winchester 40 cal Ammo - 20 Rounds of 180 Grain JHP Ammunition

    21 In stock now

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    Image For 20 Rounds Of 180 Grain JHP Boxer Nickel-Plated Brass 40 Cal Winchester Ammunition
    $25.00 Price

    Qty:

    • 20 Rounds
    • Made by Winchester

    • New Condition
    • 20 Rounds
    • Made by Winchester
    • American-made Self-Defense
    • $1.25 Cost Per Round
    • Winchester SKU S40SWPDB1
    • UPC 020892217874
  5. Winchester 40 cal Ammo - 20 Rounds of 165 Grain JHP Ammunition

    1 In stock now
    Image For 20 Rounds Of 165 Grain JHP Boxer Nickel-Plated Brass 40 Cal Winchester Ammunition
    $25.00 Price

    Qty:

    • 20 Rounds
    • Made by Winchester

    • New Condition
    • 20 Rounds
    • Made by Winchester
    • American-made Self-Defense
    • $1.25 Cost Per Round
    • Winchester SKU S40SWPDB
    • UPC 020892217850
  6. Federal 40 cal Ammo - 20 Rounds of 135 Grain Expanding FMJ Ammunition

    1 In stock now

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    Image For 20 Rounds Of 135 Grain Expanding FMJ Boxer Nickel-Plated Brass 40 Cal Federal Ammunition
    $26.00 Price

    Qty:

    • 20 Rounds
    • Made by Federal

    • New Condition
    • 20 Rounds
    • Made by Federal
    • American-made Self-Defense
    • $1.30 Cost Per Round
    • Federal SKU PD40GRD
    • UPC 029465062675
  7. Speer 40 cal Ammo - 20 Rounds of 165 Grain JHP Ammunition

    41 In stock now

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    Image For 20 Rounds Of 165 Grain JHP Boxer Nickel-Plated Brass 40 Cal Speer Ammunition
    $27.00 Price

    Qty:

    • 20 Rounds
    • Made by Speer

    • New Condition
    • 20 Rounds
    • Made by Speer
    • American-made Self-Defense
    • $1.35 Cost Per Round
    • Speer SKU 23970
    • UPC 076683239709
  8. Federal 40 cal Ammo - 20 Rounds of 165 Grain JHP Ammunition

    6 In stock now

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    Image For 20 Rounds Of 165 Grain JHP Boxer Nickel-Plated Brass 40 Cal Federal Ammunition
    $29.00 Price

    Qty:

    • 20 Rounds
    • Made by Federal

    • New Condition
    • 20 Rounds
    • Made by Federal
    • American-made Self-Defense
    • $1.45 Cost Per Round
    • Federal SKU P40HS3
    • UPC 029465089467
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Smith & Wesson and Winchester introduced the .40 S&W in 1990, replacing the 10mm cartridge used for a short time by the Federal Bureau of Investigation. The 10mm had proven to be too difficult for many agents to control when firing, due to the combination of harsh recoil and large grip size. In response, the FBI searched for a cartridge with less recoil that fit in existing 9mm frames, and could deliver the amount of penetration required by the FBI. The .40 S&W met these requirements, was adopted by the FBI, and was enthusiastically embraced by the law enforcement community. Civilians soon followed, offering their own endorsement of the caliber.

A strong feature of this ammunition is that it is a "middle ground cartridge," yet it avoids being a compromise. The .40 S&W has more muzzle energy and down-range energy than a 9mm, although the same sized pistol in 9mm will be able to hold more rounds since the 9mm cartridge is smaller. A pistol chambered in .40 can hold more rounds than it could with .45 ACP, but the muzzle energy of the .45 is considerably higher than that of a .40. The .40 strikes the right balance between muzzle energies and magazine capacity, and has been approved by exhaustive testing on the part of the FBI and many other agencies – resulting in widespread adoption of the .40 among the police community. It is also worth noting that the .40 S&W has been adopted by the U.S. Coast Guard as its primary issue sidearm.

The .40 is popular with civilians for many reasons. A wide variety of options exist for bullet weight and bullet design, and if a manufacturer produces a new line of self-defense firearms, they are sure to offer it in .40 caliber. Civilians appreciate the same benefits of the caliber that made it so popular with law enforcement: magazine capacity, muzzle energy and limited recoil. The cartridge is popular for home defense and concealed carry, as seen in the number of pistols chambered in .40 S&W of compact and sub-compact size. Defensive ammunition in .40 S&W is offered by several manufacturers including Federal, Hornady and Magtech – just to name a few.

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