There are two main types of 40 cal ammo. They are the .40 S&W and .40 S&W subsonic. The S&W in both types of 40 cal ammo stand for Smith and Wesson. The .40 S&W was originally produced as .40 S&W subsonic. The velocity of this type of 40 cal ammo was 980 feet per second. The weight of this bullet was 180 grain. Now, the main type of 40 cal ammo produced is the .40 S&W. The 180 grain .40 S&W bullet has a velocity of 1,050 feet per second. That makes this type of 40 cal ammo faster than the original. There are different weights of the .40 S&W’from 135 to 200 grain. Each weight carries a different velocity’ranging from 1,050 feet per second to 1,190 feet per second.
The .40 S&W type of 40 cal ammo is a rimless pistol cartridge. This type of 40 cal ammo is usually between 105-200 grain weight. The reason this type of 40 cal ammo was made was to ensure that law enforcement officers had a bullet that was close to what the Federal Bureau of Investigations (FBI) agents were carrying at the time. This new type of 40 cal ammo ensured that. This type of 40 cal ammo only needed a slight size modification to be able to be used in the 10mm guns of the law enforcement officers and FBI. The length of the 40 cal ammo just had to be changed to fit in to the barrel of the gun correctly. It was an easy change for the creators to make.
The .40 S&W type of 40 cal ammo made its appearance in 1990, the same year that the Smith and Wesson Model 4006 pistol came out. A new version of the Glock came out that year too. With the size modification, this type of 40 cal ammo worked perfectly in each of these guns. The new Glock made it to the market first, so officers and FBI agents began using it. Law enforcement officers and FBI agents made the switch because this type of 40 cal ammo gave the more power than the typical 9mm. The smaller size of this 40 cal ammo also allowed the magazines to hold more rounds than their typical 45. The new gun and the new type of 40 cal ammo became successful immediately.
The .40 S&W type of 40 cal ammo is best when used against targets that are not heavily armored. Having heavy armor on the target can slow the bullet and lessen the penetration. That lessons the damage to the target. A less armored target will receive more of the full power from this type of 40 cal ammo than a fully armored target will.
Both types of 40 cal ammo were designed and produced by Smith and Wesson and Winchester. Today, many other companies manufacture it, but the most popular manufacturers are Federal, Remington, Car-Bon, Warrior Arms, and Winchester. Although this type of 40 cal ammo was originally produced as subsonic, today it is produced simply as the .40 S&W type of 40 cal ammo.