I have shot and done very well with sporting clays with 7/8 oz of 8 1/2's out of a skeet choked gun. I will generally score in the low 40's for 50 birds. Don't worry about the longe distance crossers. Always try to take the easier close bird first, no sense on missing a gimme by going after a tough target that you probably won't get anyway.
You may get one with that theory, but two only infrequently.
