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Old October 26, 2021, 06:57 PM   #8
RC20
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Join Date: April 10, 2008
Location: Alaska
Posts: 6,891
Kind of a long story but keeping it short, I had occasion to test 5 lots of 270 Winchester. 130 to 150 grain. I was using a LabRadar.

All were a bit higher for listed velocity. My barrel is 26 inches so that is longer than the old standard of 24 and what seems to be the new standard of 20.
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