I cast a bunch of .600” and .690” roundballs today . Precision Reloading sells some rather stout and thick steel compatible wads for the 10 and 12 gauge . Anyway the .600” ball fits nicely inside the 12 gauge and I’m hoping the .690” will fit relatively well in the 10 gauge wad . A fellow on the
www.castboolits.com forum turned me on to this . If I can get them to shoot as well as the slugs in my old doubles I’ll try them on deer . Hopefully I’ll be able to fit two .600 balls in the 2 3/4” 12 wad , pretty sure the 12 3” wad will handle them . The fellow that told me about this was shooting three of the .600 balls in a 12 gauge 3 1/2” . I’m afraid in the 10 it’ll be a single ball only deal .