Brenneke SL123SUS SuperSabot 12 Gauge 3in 1.125oz 490Gr Sabot Slug Shotshells - 5 Rounds - The lead-free SuperSabot's controlled mushrooming is dependent on its target resistance. It is ideal for use with rifled barrels, however, if you prefer a smooth barrel, chokes must be omitted. The SuperSabot presents 58% more frontal and expands up to an incredible one inch in diameter. And its accuracy rivals many centerfire rifles. The SuperSabot is constructed with an aluminum point, brass jacket/core, and a carcass that opens when leaving the barrel.