As Jim said, it would really help to know WHAT clay targets you are shooting. No matter what you are shooting, you WILL want to have a choke tube inserted to prevent damage to the threads at the muzzle area.
Skeet is a close game, constrictions of Skeet (.005), or IC (.010) will work fine.
Trap from the 16 yard line would require at LEAST the IC, better would be a Mod (.020).
5-stand can range from close to far - either an IC or Mod
Sporting Clays, same basis as 5-stand, but I would lean more towards a Mod for an all around
As Jim mentioned, the largest load you can use in any of the clay games is 1-1/8 of 7.5 - no hunting loads if they are larger in shot size or payload