Which type of powder is more stable when ignited?

Smokeless powder is considered to be more stable when ignited compared to other types of powder due to its chemical composition and design. Smokeless powder is made from nitrocellulose or a combination of nitrocellulose and nitroglycerin, which allows it to burn in a controlled manner. This results in a more efficient and consistent combustion process that generates less smoke, hence the name "smokeless."

The stability of smokeless powder means it can tolerate variations in temperature and humidity better than black powder, which is much more sensitive to ignition and can degrade over time, becoming more dangerous to handle. Additionally, smokeless powder produces a higher energy output per weight, making it preferable for modern ammunition.

In contrast, black powder is an older formulation that consists of potassium nitrate, charcoal, and sulfur, which can be more volatile and less stable. Gunpowder is often considered synonymous with black powder in everyday language but does not have the characteristics of smokeless powder. Cordite, while an early form of smokeless powder, is generally not as stable as modern smokeless formulations specifically designed to minimize sensitivity and maximize performance.