如果一個早上就要消耗三四百發子彈，最經濟的辦法是自己裝填子彈，同時不同的火藥比例也可以帶來不同的射擊表現，所以裝填子彈是每一個射擊玩家必經之路。

There are many different smokeless powders available in a wide variety of burning rates. Powders are available in two types of composition; Single base and Double base. Single base powders are made from a straight nitro-cellulose composition. Double base powders contain both nitro-cellulose and a percentage of nitroglycerin.  Powders most commonly used by the reloader are available in three types. 

1.  Extruded or Tubular
This type of powder is most commonly used in rifle cartridges, and is usually single base. However, there are a few which are double base. Burning rate is controlled by composition, grain diameter and length, web thickness, and deterrent coating. Extruded powder can vary greatly in appearance and grain size.

2.  Spherical or Ball Powder
Spherical powder can look like tiny round balls or the grains can be flattened. The grains can vary in size, shape, and color. The burning rate of spherical powders can range from a fast pistol powder to very slow rifle powder. All spherical powder is double base and burning rate is determined by chemical composition, grain size, and deterrent coating. Spherical powder, in general, is harder to ignite than extruded powder, therefore magnum primers are recommended in certain loads.

3.  Flake
This type of powder is usually double base fast burning, suitable for pistol, shotgun, and light sub-velocity loads in rifles. Flake powders in slower burning rates suitable for rifles are not available in this country, but have been used in Europe.