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Beano, that was a good posting!
But I feel that barrel length does affect velocity and therefore pattern to a smaller extent perhaps, depending upon the particular cartridge/powder load, [and those of us who reload can tailor this factor into them for various guns using various powders and shot-loads/wads].
I have various shotguns in 12GA from 20" to 28" long and after playing around with my Chrony F1 I feel there is around a 80fps loss in velocity from one length to the other, (more in magnum 3"loads using W571.)
Small beer it maybe... but could be interesting to some members .
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***Big Bunny***
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