Safety shelf-life of ammunition is often called chemically safe shelf-life and it is a period when the propellant is safely storage without any risk for environment. Safety shelf-life is limited with intensity of chemical reactions by aging, like degradation of nitrogen ester and reaction of these degradation products with stabilizer in the propellant. Functional life or ballistic shelf-life is a period when propellant or ammunition can be safely used and during which inner ballistic parameters are unchangeable. Main factors of propellant that limit functional life are decreased molecular weight of nitrocellulose, as a result of diffusion and incompatibility of the aging process. It is normal that ballistic shelf-life of ammunition usage is shorter than safety shelf-life ammunition usage. Shelf-life is interval during which propellant can be stored without danger, operated and used.