Which type of powder is known for being less stable?

Black powder is considered less stable compared to other types of powders used in firearms. This is primarily due to its composition, which includes potassium nitrate, charcoal, and sulfur. These components can undergo rapid decomposition when exposed to heat, moisture, or impact, leading to unpredictable reactions. As a result, black powder can be more sensitive to ignition and may require more careful handling and storage to prevent accidental detonations.

In contrast, the other types of powders mentioned—plastic, granular, and hydraulic powders—tend to have more stable properties and are designed for specific applications that require different performance characteristics. For example, plastic powders are often utilized in modern ammunition for their consistency and lower hazards, while granular powders offer specific burn rates suitable for various firearms but lack the volatility that characterizes black powder. This stability is crucial for safe handling and reliable performance, making black powder notably more hazardous in certain conditions.