4th. Down, I've been looking all day for Andrew's book (mine is autographed!) but it has escaped me. I wanted to present a documented united front on this, but you will just have to take my word for it that Andrew found the same thing.
I've done the tests twice; I'll present the second one first.
With one ounce Remington shells, there was no pattern difference between lights and Nitros:
and when I added light and Nitro 1 1/8 oz shells there was no difference either:
I did a more organized test in September of 2006 using handloads with chronographed average speeds of 1030, 1130, and 1230 feet-per-second.
There was a small, small difference between the slowest 1030 fps shells and the next step, 1130 fps.
HMB says it's a "speed of sound" effect and I thought that too, for a while, but have since been given better advice and don't believe that anymore. I don't know why I got the effect I did, but I think it's "real," not just chance variation.
I'm sure you heard "lots of discussion" at your club about this; it's a favorite topic that everyone knows the answer to. But when you hear it, you should ask "How do you know?"
You will be told either that Don Zutz wrote a lot about it or that the speaker himself (or herself) "did some patterns" and that's how they came out.
Then you ask "How many patterns? How much did they differ, not in "appearance" but numerically? What was the pellet-count difference in 30 inches?"
By this time you will just have made them mad, but you should remember that it's just possible that they did do the kind of patterning everyone does (not even earning a rating of "half-assed") and just saw what was expected. Patterns are equivocal when just viewed and you can convince yourself you see just about anything.
Of course, "eyeballing " tells you nothing, but even if it did, what would you do with the data as it came it, pattern by pattern?
Patterns go up. They go down, and their interior components are always changing as well so how could anyone know if they were the same or different without really doing some work, organizing the results, and seeing what the evidence compelled one to believe?
Here's what's really going on.
If you ever want to talk about my results come on over to Metro; there's always plenty of room, plenty of empty chairs, at the table I sit at for some reason . . .
Yours in Sport,