I have everything from 10" Exemplars to 28" rifles. Long heavy barreled guns are more forgiving to shooter input. My 15 7/8" custom Exemplar pistol is probably my most accurate gun but the 28" old target rifles are right there with it. Velocities and scope settings for the 16 and 28 are nearly identical. We have a few with 20" and they are faster. Don't know if there is a best overall barrel length for accuracy but there may be a best barrel length for specific uses.
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