The Complete Handbook of Paintballs

Chapter 1: Understanding Paintballs

Paintballs are ammunition. They are small, spherical projectiles—typically 0.68 inches (17.3 millimeters) or 0.50 inches (12.7 millimeters) in diameter—filled with water-soluble dye and propelled by a pneumatic marker (colloquially called a paintball gun) powered by compressed air or carbon dioxide. They travel at controlled velocities (typically 280-300 feet per second for recreational and tournament use), break on impact, and mark a target with visible paint. This seems straightforward, but the actual design, manufacturing, and performance characteristics of paintballs involve measurable specifications that directly affect marker reliability, player experience, field conditions, and operational cost. Understanding what paintballs are and how they work is essential for anyone who purchases, stocks, operates with, or maintains paintball equipment at a professional or serious hobbyist level.

Physical Composition and Structure

A paintball consists of three main components: the gelatin shell, the paint fill, and a thin membrane separating the two. The shell is typically made from gelatin (a protein-based polymer) or a synthetic gelatin substitute, molded into a nearly perfect sphere. The shell thickness generally ranges from 0.002 to 0.004 inches (0.05 to 0.10 millimeters), which is critical because it determines how much force is required to break the ball on impact. A thicker shell resists accidental breakage during handling, loading, and feeding through a marker's hopper, but it also requires a higher impact force to rupture and mark a target. A thinner shell breaks more easily on impact but is more prone to damage during storage or transport, which creates