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Thread: 22lr barrel length with subs

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  1. #2
    Member
    Join Date
    Jan 2015
    Location
    Wellington
    Posts
    2,718
    IIRC, peak velocity is achieved around the 14" mark. Depends on a few factors though, such as rifling and tolerances in the barrel, bolt action vs semi-auto, and the makeup of the ammo. Some subsonic ammo may well go supersonic at that length.

 

 

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