The load you list for your trap load is nearly identical to the load I used for many years when I was shooting trap a lot. I used Win. #209 primers and AA hulls , Rem. RXP wads (don't know if they even make them anymore, but whatever wad it takes to give you the right shot column length), and 17.5 gr. 700X, 7 1/2 shot. Yeah, you got that one right, for sure. Never shot any sporting clays, but feel it should work for them too.