This 9mm cartridge features a 124 grain projectile. Its a redesign of PMCs Starfire bullet, which utilizes ribs and flutes in order to strategically weaken it that it may double its diameter during penetration. This bullets hard jacket not only ensures that it can penetrate a target reliably, but furthermore facilitates smooth feeding in a semi-automatic. The bullets profile itself works toward that end as well, so youll be far less likely to be put over a barrel by a jam when youve chambered an SFX round. This rounds brass casing, non-corrosive primer and case mouth that are both sealed against intrusive water, and uniformly loaded propellant are all similarly able to be counted on during a fight, making this round totally worthy of your weapon for self-defense.