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Rifling question

Discussion in 'Handguns: Revolvers' started by KJS, Mar 20, 2011.

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  1. KJS

    KJS Member

    Joined:
    Sep 20, 2009
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    Location:
    Milwaukee, WI
    I know different bullets require different amounts of twist to stabilize them. That's about all I know.

    Why do some guns that fire the same ammo have different rates of twist and a different number of groves? Seems especially odd when the examples I've selected below are all from Ruger and fire the same .357 ammo.

    -GP100 & SP101: 5 groves 1:18.75" RH

    -Blackhawk & Vanquero: 8 grooves 1:16" RH
     
  2. Jeff82

    Jeff82 Member

    Joined:
    Oct 31, 2004
    Messages:
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    Location:
    East Coast
    Heavier bullets (longer) need faster twists to stabilize. Looks like the Blackhawk & Vaquero were intended to fire a heavier bullet. Number of grooves is just the choice of the manufacturer.

    http://kwk.us/twist.html
     
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