Claybuster has a 3/4 oz wad for 12ga.
Never tried them but have a Lee 12ga Load-All that's been sitting on the bench for a year or so. One of those things I keep meaning to delve into. Thought I might gin up some low recoil 12ga that are roughly a heavy .410 equivalent.
If you look up Claybuster website, they have load data for the 12ga with their 3/4 oz wad, with various hulls/primers.
