stabilization question

Discussion in 'The Basics, Starting Out' started by foreign, Jul 29, 2009.

  1. foreign

    foreign Well-Known Member

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    im having something funny happen with my brothers .223 at the moment. its a zastava .223 and i thought it would be a 1 in 12 at the most but if just put some 65gr sierra sbt through it and they are grouping and not key holeing at 100m. if there not key holeing at 100 does that mean there stable?? going to try them at 300m and see what happens?
    was trying to work up a load with some bulk 55 gr bullets and just thought id try the heaver ones and the first load i tried grouped better than all the other loads i had tried.
    reakky jut wondering if once i take them out to further ranges if they will start tumbling. eg 600m
    cheers
     
  2. Michael Eichele

    Michael Eichele Well-Known Member

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    My experience is that if they punch round holes at 100 yards then they are stable. Thest them at 300 and if they are still straight, dont worry about it.
     

  3. foreign

    foreign Well-Known Member

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    well there punching tight little holes at 250m. pitty the load had around 4 inchs of vertical dispersion. maybe remington brass and winchester primers are not the answer...
     
  4. Varmint Hunter

    Varmint Hunter Well-Known Member

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    Why don't you just use a cleaning rod with a tight patch to determine what the twist rate is?