I got into a bit of an argument one day on the clays range with a hard core registered shooter about shotshell velocity. He was claiming the 1300 fps loads he was shooting cut his lead in half. After we got back to the clubhouse we did the math. I think we used 30 yds crossing at 45 mph as criteria. It turns out that the increased velocity did in fact reduce the lead required - by 4 inches. Most people cannot perceive 4 inches at that distance. The next time I saw the guy he was still shooting his screamers. My dad used to say "don't confuse me with the facts, my mind is made up". I think that little ditty applies to a bunch of folks.
Tom, don't discount pressure as inconsequential. It certainly affects pattern performance.
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