A wax bullet is a bullet made of wax, often paraffin wax or some mixture of waxes and other substances that produce the desired consistency. Wax bullets are typically used in a primed cartridge case, with no gunpowder. The primer provides all the necessary power to propel the wax bullet at low velocities. Wax bullets have been in use for over a century, providing a projectile for use in training, indoor shooting, and shooting competitions where a high velocity metal bullet would be needlessly hazardous.
Wax bullet cartridges do not provide enough force to cycle automatic firearms, so they are most commonly used in revolvers and other manually cycled firearms. Specially designed cartridges and conversion units can be combined to convert automatic firearms into wax bullet firing guns, and these are used for training police and military.
In the past, wax bullets were used by illusionists for illusions involving firearms, such as the Bullet Catch. This practice goes back at least as far as Jean Eugène Robert-Houdin, who used hollow wax bullets colored to resemble lead balls. When placed on a charge of gunpowder, the wax bullet would disintegrate upon firing.
Wax bullets are not normally lethal, and will not penetrate sturdy walls, so they are safe to use indoors or in situations where live ammunition is dangerous. This is not to say that they are entirely safe, as velocities are around 500 feet per second (160 meters per second). This exceeds the velocities of paintballs, and serious damage could be done to sensitive areas, so suitable precautions should be taken when using them.
Wax bullets can be easily constructed by using a cartridge case to punch a cylinder out of a sheet of paraffin wax, and then priming the cartridge using normal handloading equipment. The optional addition of beeswax and/or grease will produce a softer, more flexible bullet than pure paraffin. Higher velocities may be obtained using special cartridges drilled out to accept shotgun primers, which provide higher velocities, and some fast draw competitions allow the use of a small amount of black powder or black powder substitute to provide higher velocities for certain events. Commercially produced wax bullets are also available, and may be required for competitions. These pre-formed bullets are simply pressed into the case mouth.
Fast draw and trick shooters often use wax bullets for safety reasons, so that if they shoot themselves in the foot or leg when drawing from their holsters, they are not seriously injured. The World Fast Draw Association uses wax bullets in many of their competitions, along with special "balloon popping" blanks that fire coarsely ground gunpowder. Bullets used in World Fast Draw Association and other similar competitions must be commercially manufactured, and there are a number of manufacturers who produce wax bullets for this purpose.
During the early 20th century, there was some interest in mock dueling with pistols loaded with wax bullets. The sport first gained popularity in France, and heavy canvas clothing was worn to protect the body, a metal helmet with a thick glass plate protected the head and face, and the pistols were often equipped with guards on the front of the trigger guard that extended outwards to protect the shooter's hand. For a brief time it was popular. It was featured as an associate (non-medal) event during the 1908 Summer Olympics in London.
There are a number of other low velocity, low mass projectiles available to shooters. Rubber or plastic bullets designed for short range target shooting with primed cases can also be purchased; these are generally reusable if a proper bullet trap is used, but are prone to ricochet. With wax bullets, a simple sheet of plywood is sufficient to stop the bullet—upon impact the wax deforms and sticks to the wood, where it can later be scraped off and reused. The cost per round of wax bullets is low as primers can be purchased for under US$ 2.00 per 100 in case lots and as the wax itself can be reused. Reloading is very quick, and requires minimal equipment: a decapper tool to knock out the used primer and a priming tool. With these, loading 50 rounds of wax bullets will take under ten minutes. Wax bullets are normally used only in revolvers and single shot pistols for short range target practice. Magazine fed firearms can use wax bullets, but they may need to be fed individually.
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The US military uses 5.56 mm non-lethal marking rounds in training. The bullet has two primers. The forward primer propels a wax-filled projectile that marks with colored wax upon contact. The wax washes out with normal laundry procedures.
Simunitions (for "simulated munitions") are special cartridges that fire colored paint-filled plastic projectiles which are used to mark targets much like paintballs. Simunitions are designed to cycle the actions in specially modified semiautomatic rifles and handguns. The paint-filled plastic projectiles are more durable and accurate than paintballs, and it is safe to be shot by them when wearing protective clothing. Simunitions are used by police and military forces for realistic training. Unlike normal wax bullets, simunitions are not an inexpensive substitute for live ammunition—costs for simunitions cartridges are as much as three times the cost of live ammunition.