The lightest load I have ever tried are the "Remington Shurshot Heavy dove Loads which are 1 1/8 ounce load and 3 1/4 dram. My SBE II shoots perfect with these loads. My son has about 10 cases of 'Winchested Upland Game loads that he got cheep. These shells are 1 ounce loads and 3 1/4 dram. I would like to use these cheep loads, but I have never tried them. I was under the impression that my SBE II would jam if I tried them, but maybe I should try them out and see.