Hevi-Shot 3 ½“ Magnum Blend 12 Gauge shotgun ammunition uses Pattern-density Technology. This high-tech Hevi-shot load resists cross-wind effects and delivers devastating lethality. Magnum Blend 12 Gauge shotgun ammo uses a mix of size #5, #6, and #7 shot. These great Hevi-Shot shells create a remarkably tight pattern and group allowing for fewer misses and less crippling.