What does internal ballistics study?
Internal ballistics describes what happens inside a firearm during a shot. Energy stored in the propellant produces hot gases. Their pressure changes over time and accelerates the bullet through the barrel. A rifled barrel also gives it spin.
Internal ballistics describes what happens inside a firearm during a shot. Energy stored in the propellant produces hot gases. Their pressure changes over time and accelerates the bullet through the barrel. A rifled barrel also gives it spin.
Pressure and velocity are different quantities. A measured velocity does not reveal the entire pressure history. Nor does a cartridge that looks normal prove that the internal process stayed within its intended limits. Such questions require purpose-designed test methods and instruments.
A published velocity always belongs to a particular cartridge, test barrel and defined conditions. The cartridge name alone provides no unchanging value. At the muzzle, the transition to free flight begins. Events immediately around that point are often called transitional ballistics. External ballistics then studies motion up to impact. These terms organise the subject; they are not instructions for modifying ammunition or components.