.40 S&W/10mm

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About 10mm and .40 Bullets

10mm ammo was introduced back in 1983 as a semi-automatic pistol cartridge, then known as 10mm Auto. The round was briefly used by the FBI but was later decommissioned due to the excessive recoil it produced. A reduced-recoil round was created in response to this known as “10mm Lite.” Later, Smith & Wesson created a new version of the 10mm round with a shorter casing, allowing for use in smaller semi-automatic handguns. This became known as the .40 Smith & Wesson often referred to as .40 S&W or just “forty cal.” The handgun cartridge has since become popular among law enforcement, while the 10mm Auto is still relatively popular as well.

10mm/.40 Cal Performance




Size: The 10mm Auto has a bullet diameter of .400 inches, a neck diameter of .423 inches, and a base and rim diameter of .425 inches. The case length is typically 0.992 inches.

Muzzle Velocity: Typically, the muzzle velocity of a 10mm Auto round can range from about 1,200 to 1,400 feet per second, depending on the load.

Stopping Power: 10mm Auto is a powerful round. The muzzle energy can range from about 550 to 700 foot-pounds for common loads.

Terminal Ballistics: The 10mm Auto is known for deep penetration and a large permanent wound channel, making it a popular choice for hunting and self-defense.

Recoil: 10mm Auto is known for its substantial recoil, which can be challenging for some shooters to manage, particularly in rapid-fire situations.

.40 S&W


Size: The .40 S&W has a bullet diameter of .400 inches, and a neck, base, and rim diameter of .424 inches, The O.A.L is typically 0.850 inches.

Muzzle Velocity: The muzzle velocity of a .40 S&W round typically ranges from about 950 to 1,200 feet per second, depending on the load.

Stopping Power: .40 S&W rounds typically have muzzle energy ranging from about 350 to 500 foot-pounds.

Terminal Ballistics: .40 S&W provides good penetration and a significant permanent wound channel. It’s a popular choice for law enforcement and self-defense due to its balance of power and control.

Recoil: The recoil of .40 S&W is generally more manageable than the 10mm Auto, but it is still more substantial than smaller calibers like the 9mm.

These are generalized figures and actual results will vary based on a range of factors, including the specific ammunition used, the type of bullet and load, and the firearm it’s fired from.

10mm and .40 Bullets from Berry’s

Looking for some 10mm or .40 S&W bullets for reloading your ammunition? We’ve got you covered. Berry’s has the best plated bullets on the market whether you are looking for self-defense, handgun hunting, working in law enforcement, competitive shooting or anything in between.

We are proud to offer the finest bonded copper-jacketed bullets on the market today. Berry’s plated bullets are started with a swaged lead core and are then electroplated with copper to their final weight. We carry a wide selection of .40 S&W/10mm bullets including flat point, round nose, hollow point, and more in grains ranging from 155 to 200.