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The others were all 20" barrels, so should expect to loose 25-50fps velocity per inch of barrel from the 24" test barrel.
Box say 2770 for 24"barrel. so for a 20" barrel 2570-2670 would be the expected velocity.
Then some are faster than others, worn throat etc, over my head.
Z
That measurement was taken from the first 3-5 rounds the barrel had through it. Not sure if that makes a difference?
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