In the colonies of Australia, we're a bit behind. 20 years ago, it was all 28s, with the odd 30. I tried 30s in a 686 Onyx Sporting and it was a pig of a gun. Fast forward and I'm re-entering Sporting Clays. 30s are everywhere, and 32s are rare. Our Miroku Mk10s have ventilated barrels, and to...