Ballistics - Interior

: Once pressure exceeds the "shot-start" resistance, the projectile begins to move down the barrel. Propellant continues to burn, and gas volume increases as the projectile accelerates.

Several variables determine how effectively a projectile is launched: Interior ballistics

: The ratio of the propellant volume to the total chamber volume; higher density generally leads to more uniform burning. : Once pressure exceeds the "shot-start" resistance, the

: Often coupled with ballistic codes to study how the physical structure of the barrel deforms under pressure. : Often coupled with ballistic codes to study

: Controlled by the chemical composition and the geometry of the grains (e.g., tubes, balls, or perforated cylinders).

Detailed research on these models can be explored through organizations like the Royal Military Academy or in technical handbooks provided by the Defense Technical Information Center (DTIC) .

: Highly complex 2D or 3D simulations (like NGEN3) that account for gas flow, heat transfer, and pressure waves.