I preferred something a little more stout for my loads. Can't recall the charge thrown, but I use a#31 bushing for 1oz and a #33 bushing for 1-1/8oz in my MEC with International Clays. I tried 700X a few years ago when powder was non-existant, couldn't stand it. Couldn't get the velocities I wanted, and it's DIRTY. Waited and went back to International, which I've been using for like 20 years.
Wads I settled on were Claybuster AA12SL for 1oz and AA12 for 1-1/8oz. So far I have found they are interchangeable in most Win and Rem hulls. They don't work in any Fed, Rio, or Win game load hulls. But if it's AA, STS, Gun Club or Rem game load hulls I'm good.
Don't have any information on 20ga for you, sorry.
Remember, shoot straight and shoot often.
Good... Bad... I'm the guy with the gun.
Last edited by TRAPJAW; 05-15-2017 at 12:36 PM.