I have done all my Chrono testing the past 2 years - thru a 30" barrel. Now I will be shooting a 32" barrel. Should I expect any significant change in velocity ? Thanks, Brian
No. You may get a different reading, but that's just the inevitable and unpredictable random difference between barrels, not the difference in barrel length.
There was a test result published in one of the magazines I read couple years ago, I think basically it said 12 ga shotgun barrel over 24" have little or no effects on velocity until over 35 or 36" then it starts to drop.
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