My Benelli SBE functions 100% with 3" and 3 1/2" steel waterfowl loads, tungsten-iron, and with lead from 1 1/8 oz target loads and up. It does not, however, reliably cycle either 3" or 3 1/2" Remington Hevi-shot waterfowl loads. I'm not really too concerned because most of my duck and goose...