A blow by any part of a throwing weapon, boulder or rock counts as a hit; so all parts of these weapons need to be strike-legal. Javelins must strike point first to count as a hit and cannot be used to slash. A javelin must be legal for melee and have padding along the entire shaft. The tips of all projectile weapons must not be able to fit through a 2.25 inch ring. Projectiles, with the exception of javelins, may not have solid cores. Materials you may use for projectile cores include foam, sweatshirt material, and other soft, non-granular and non-rigid materials. Pennies, batteries, sand, and the like may never be used as cores.