Sample of tracked projectile trajectories during target penetration. Plus signs: Teflon projectile. Asterisk: glass. Diamonds: brass. The symbol sizes indicate the grain size of the target material, with smaller symbols for the mm-sized target grains, medium ones for mixed targets, and larger symbols for cm-sized targets. The color denotes ranges in impact energy, with blue for impacts below 10⁻³ J, green between 10⁻³ J and 10⁻² J, and red above 10⁻² J.