There is a guy in Okla. that does or did a lot of pattern testing on a revolving drum. I don't recall the name off hand exactly but want to say Larry Feland [sp?]. He was primarily interested in trap loads, but published some of his findings in a booklet. Perhaps someone here can post the name & addy for you.

To answer your question, 'how great is that price?' JL hit it, except he didn't put it in terms of milliseconds and that's all you have in front, a few milliseconds. Behind its moot, except when the third bird back from the one you were shooting at falls out of the flight, stone dead.