Get a copy of Jim Gregg's "Method of Fire Control." In it, he lists 1,241 shooters who he has trained to become members of his "Hole-in-One Club" from February, 1991 to September, 2004. Five rounds, 15 feet, one hole. He claims 80% to 100% of students in any one class achieve this. Having talked to him and some of his students, I believe him.
http://www.JimGregg.net
I have taught point shooting for years, but his book taught me some stuff.
I hope soon to take one of his classes.
Pops