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Old October 11, 2020, 10:08 PM   #25
BBarn
Senior Member
 
Join Date: December 22, 2015
Posts: 887
Results can be surprising at times. My Ruger American in 243 does fine with 100 gr bullets, but won't produce something resembling a group with 105 gr. HPBT Match bullets. The extra length and mass combine to de-stabilize the match bullets even in the case of my 1 in 9" twist barrel. Berger's bullet stability calculator even suggests as much, recommending a 1 in 7.75" or faster twist for that HPBT Match bullet.
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