What twist?

hadjii

July 30, 2014 17:26

I'm wanting to put together a 6.5-06 and wondering what twist would be
best for using 100-125 gr. bullets? Plan on having the barrel be 26
inches. Any thoughts would be appreciated. Thanks.

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  tsr1965

  July 30, 2014 17:31

  1 in 8 or 8.5 would be good, for those weights. However the 1 in eight would work with the 140's, and possibly the 160's

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  charliemeyer007

  July 30, 2014 17:37

  One of my favorite rifles as a kid was dad's 256 Newton QT built by A&M. It would shoot really well with 87 to 180 grain bullets. I think the twist rate was 1 in 7.5 thus the Quick Twist. I haven't seen bullets bigger than 160 grain for sale in years.
  
  added http://kwk.us/twist.html

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  XXCross

  July 30, 2014 18:04

  If you want to know the twist for a particular bullet weoght
  in a given caliber, google the greenhill formula and do the math.

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  nononsense

  July 31, 2014 02:24

  hadjii,
  
  Those are light to intermediate weight bullets so they require only a mild twist rate if those are the only bullets you want to shoot.
  
  1:10" is sufficient for these but if you ever decide to go longer (heavier) you'll need something in the range of 1:9", 1:8.7" or even 1:8.2" which we use for Match bullets, VLD's and Hybrids.
  
  Best.

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