Delivering effective shot patterns that place all projectiles on a man-sized target at seven yards, the Critical Defense 410 features a unique Triple Defense projectile column consisting of two 35 caliber round balls topped with one non-jacketed FTX® slug. The 41 caliber FTX® slug actually engages the gun's rifling, and contacts the target nose-on, enabling expansion for greatly enhanced terminal performance. Each 35 caliber round ball is made of high antimony, cold swaged lead to resist deformation and provide excellent penetration.