I use clays/clay dot powder , 31 MEC bushing (17.1-17.4gr) , claybuster 7/8 winchester grey clone , and winchester/chedite primer , in a STS , NITRO 27 or a gun club hull . I use 7 1/2 , 8 1/2 , and 9 shot , using these in trap upto 24 yds (practice) , skeet and sporting clays (short yds) . I load about 10,000 per year , a fantastic load , reccomend it highly . Phil Burton #9502565