Lehigh Defense Xtreme Defense, .40 S&W, 115 Grain, XD FTM, 20 Round Box LA40-115-XD Lehigh Xtreme Defense solid copper bullets have deep, straight penetration while creating a permanent wound cavity diameter exceeding that of most expanding bullets. This very rapid increase in fluid flow often times creates cavitation and massive tissue damage at distances away from the projectile equivalent to the largest of hollow points on the market.