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Several propellants were tried in various programs: One of the later (1991) successful gun fuels was a saturated solution of ammonium perchlorate in ammonia. This has a vapor pressure of one atmosphere at 20 °C (68 °F), and generally forms a convenient liquid that is stable and possible to handle.
Firearm propellants are a specialized type of propellant used to discharge a projectile (typically a bullet, slug, or pellets) through the barrel of a firearm. Mixtures of different chemical substances are often used to control the rate of gas release, or prevent decomposition of the propellant prior to use.
Number 4831 was used to load navy anti-aircraft machine gun ammunition, and number 4895 was used to load United States service rifle ammunition. As these propellants became military surplus after the war, large quantities of different batches were blended together to make products with uniform average performance for sale to civilians.
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Firearms using gunpowder could be loaded using a small scoop or charge cup to determine the correct amount for each shot. Some early smokeless propellants called bulk propellants were designed for a similar volume and reaction rate as gunpowder, but most modern smokeless powders have improved efficiency offering more energy from smaller charges. [1]