Today, I had a opportunity to experiment with the tightest choke tube I could find for my Grand Italia. I normally shoot a #6 for singles (= .024) today I shot a #11 (=.044) constriction. Produced a 49x50 after mising the first target out, even to my surprise. Smoke balls like I havent seen in a long time. I'm anxious to give it a try at hdcp.