The Rimfire Report: A Brief History of Rimfire Ammunition

The Rimfire Report: A Brief History of Rimfire Ammunition

Flobert 22 bb/22 CB 6mm Flobert

The home of all rimfire ammunition can be traced back to Europe where Louis-Nicolas Flobert developed the idea of the first fully self-contained metallic cartridge. The Flobert .22 BB was introduced in 1845 and was used as a “parlor gun” within shooting galleries. The Cartridge was extremely anemic, only having about as much muzzle velocity as some toy air rifles (700-800 fps).

The design was simple, basically being a 22 caliber ball inserted into a rimmed percussion cap. No propellant was used in the making of the 22 BB or its closely related 22 CB which used a canonical bullet and was much more common. Collectively both cartridges are called 6mm Flobert and were the inspiration for all rimfire cartridges to come.

22 short/22 long/ 22 Extra Long/22 Long Rifle

22 Long was developed not long after 22 Short and carried with it more power due to the extended case length. 22 Long used the same 29-grain bullet but had about 25% more capacity for powder. The round was used mostly on farms for pest control or for hunting small game.

A short number of years later in 1880 the 22 Extra Long was introduced and used a much heavier 40-grain bullet and 6-grains of black powder giving it increased velocity and penetrating power. However, 22 Extra Long was purported not to have the greatest accuracy and was replaced 8 years later by what has been quite possibly the most popular rimfire cartridge ever.

44 Rimfire/44 Henry

Named in honor of the great Benjamin Tyler Henry (famous 19th-century American gunsmith), the 44 Henry was designed alongside the equally famous Henry Repeating Rifle manufactured by the New Haven Arms Company in 1860.

The 44 Henry and the Henry Repeating rifle were used extensively by Union Troops during the American Civil War and were so effective that it was also used by Confederate troops who could capture the rifles. The lever-action rifle went on to serve in the Winchester Model 1866 during the Russo-Turkish war by Turkish troops.

The cartridge evolved slightly throughout its years of use with the flat-nosed 200-grain bullet eventually gaining a round nose for an increased ballistic coefficient (BC). The round nose brought the BC of the 200-grain lead projectile to 0.153 which is still abysmal by today’s standard for a rifle cartridge. The 44 Henry has about the same ballistic performance as modern-day 45 ACP.

Eventually, the cartridge went on to be used in the famous Colt 1873 Single Action Army (SAA). Between 1875 and 1880 colt produced their revolver using the 44 Henry specifically to pair with lawmen, civilians and military men who used the Henry and Winchester rifles chambered in the same caliber. The cartridge saw major use until it was eventually phased out from commercial use and manufacture in the 1930s.

38 Rimfire

Developed in the 1870s through the early 1900s the 38 Rimfire was mostly used by the United States Army. Produced in short, long and extra-long variants, the cartridge was used in both rifles and pistols and originally loaded with black powder until new smokeless powders were developed in the early 1900s.

38 Rimfire gave the user better power and defensive capabilities than the earlier developed 32 rimfire caliber which saw some limited use in the preceding years. The 38 Rimfire also gave users of revolvers and rifles the ability to shoot either 38 Short or 38 Long.

This caliber also saw use in the American Civil war and extensive civilian use as a self-defense weapon, usually being found in the form of a small revolver concealed inside of a vest pocket.

Long-Lasting Concept

Today, rimfire cartridges have recessed almost entirely into the civilian shooting scene. While rimfires are cheaper to shoot, centerfire cartridges offer many advantages that make them better suited for today’s self-defense and combat needs. Even so, the rimfire lives on today, mostly in the form of 22 Long Rifle, 17 HMR, and 17 Mach 2 cartridges, all of which are great hunting and target shooting cartridges.