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Does barrel length make a difference?

Discussion in 'NFA Firearms and Accessories' started by viking499, Apr 19, 2010.

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  1. viking499

    viking499 Member

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    I am looking at putting a threaded barrel on my Buckmark. It already has a 5.5" slabside barrel that I can threaded. Or I can buy another 5.5 already threaded or a 4" already threaded.

    Is there any advantages or disadvantages when looking at a 4 or 5.5 barrel?
     
  2. waterhouse

    waterhouse Member

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    I have read but not confirmed through my own testing that the 4" barrel will allow you to use supersonic .22 ammo and not have it get supersonic due to the short barrel length. This may be an advantage.

    I have shot supersonic stuff through my 5.5" buckmark, some of it has a crack and some of it doesn't. I mostly shoot CCI standard velocity and it doesn't have the crack.
     
  3. lions

    lions Member

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    Here is my data:
    Remington Golden Bullets 525 Bulk pack. Stated velocity: 1280fps
    Federal 550 round Value pack. Stated velocity: 1260fps

    Shot from:
    Ruger MKII 5.5" bbl
    Ruger MKIII 22/45 4" bbl

    Remington:
    5.5"...........4"

    1040..........1019
    1051..........1010
    1096..........1011
    1120..........987
    1086..........1011
    1110..........1013
    1115..........1047
    1132..........1013
    1079..........1032
    1083..........1028

    Avg
    1091..........1017
    Spread
    92..............60


    Federal:
    5.5"...........4"

    1088..........1040
    1166..........1013
    1150..........1054
    1148..........1047
    1142..........1043
    1140..........1083
    1148..........1072
    1145..........1059
    1105..........1100
    1112..........1017

    Avg
    1134..........1053
    Spread
    78.............87

    Conclusion:
    With typical high velocity bulk ammo and a 5.5" bbl, you will mostly be subsonic but depending on temperature, you will be pretty close to, if not above the speed of sound occasionally.
    With a 4" bbl it is safe to assume you will be subsonic every shot.
     
  4. viking499

    viking499 Member

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    Sounds like a 4" might be the way to go.........
     
  5. lions

    lions Member

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    That's the way I went. The ability to use high velocity bulk ammo in my pistol made it worthwhile, without a doubt.
     
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