Winchester PDX1 Defender 410 Gauge 3in 4DD/16 BB Slug Shotshells - 10 Rounds - Highly effective in both 410 compatible handguns and shotguns, the 410-gauge PDX1 Defender ammunition features a distinctive black hull and black oxide high-base head combining 4 plated Defense Disc projectiles and 16 pellets of plated BB shot. The result is the ideal personal defense load for short-range engagement with the performance needed to stop threats. 410 Gauge For Short-Range Engagement Offers Critical Penetration