.40 S&W/10mm

About 10mm and .40 Cal Bullets

The 10mm bullet design was introduced in 1983 as a revolutionary semi-automatic pistol cartridge, later evolving into the more manageable "10mm Lite" due to its intense recoil. This innovation paved the way for the .40 S&W (Smith & Wesson), a compact variant favored by law enforcement for its balance of power and control. The .40 caliber, often referred to as "forty cal," and the 10mm Auto have carved distinct niches, with the former dominating in law enforcement circles and the latter maintaining popularity among enthusiasts for its superior muzzle velocity and energy.

10mm/.40 Cal: Same Projectile, Different Cal Ammo

Interestingly, the 10mm and .40 cal utilize the same diameter bullet, a testament to their shared lineage and versatility. This unique aspect allows for a broad application range, from self-defense to competitive shooting, with the .40 S&W offering a more controlled recoil and the 10mm delivering unmatched power. The adaptability of these calibers caters to a wide audience, showcasing their utility across various shooting disciplines.

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. To learn more about .40 S&W vs 10mm read our in-depth blog!

10mm and .40 Cal Bullets: Which is Best for What?

The choice between 10mm and .40 cal bullets often comes down to intended use and personal preference. The 10mm Auto, with its higher muzzle energy and deeper penetration, is better for hunting and situations where stopping power is crucial. Conversely, the .40 S&W, known for its manageable recoil and efficient terminal ballistics, is preferred for self-defense and law enforcement applications. Factors such as bullet weight, diameter, and the specific demands of the shooting scenario play critical roles in determining the most suitable caliber.

10mm and .40 Cal Bullets from Berry's

Based in the United States, Berry's is home to the finest reloading bullets on the market. We offer an unparalleled selection of .40 S&W/10mm pistol bullets, designed to meet the needs of law enforcement, home defense, and competitive shooting. Our Superior Plated Bullets® feature a swaged lead core and are electroplated with a copper jacket to exacting standards, ensuring consistent performance and reliability. Available in a variety of styles, including flat point (flat nose), round nose, and hollow point, and ranging in weight from 155 to 200 grains. Berry's bullets are the top choice for shooters aiming for precision and quality.