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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist rate and bullet stability at 900 yards
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<blockquote data-quote="Len Backus" data-source="post: 29055" data-attributes="member: 1"><p>I switched to A-max bullets this afternoon with my 7mm Dakota rifle and got some near-bughole groups as I was working up a load. Then when I had time before dark for just one group at 900 yards the vertical spread was quite disappointing compared to those groups earlier at 100 yards.</p><p></p><p>My barrel is a 9 twist and Hornady recommends an 8 for the 162 grain A-max bullet. If this bullet was grouping well at 100 yards is it still possible the poor vertical at 900 was the result of not enough twist?</p><p></p><p>PS: The bullet box label does say 8 twist but I just noticed that on Hornady's website they call for a 9 twist.</p><p></p><p>[ 10-24-2003: Message edited by: Len Backus ]</p></blockquote><p></p>
[QUOTE="Len Backus, post: 29055, member: 1"] I switched to A-max bullets this afternoon with my 7mm Dakota rifle and got some near-bughole groups as I was working up a load. Then when I had time before dark for just one group at 900 yards the vertical spread was quite disappointing compared to those groups earlier at 100 yards. My barrel is a 9 twist and Hornady recommends an 8 for the 162 grain A-max bullet. If this bullet was grouping well at 100 yards is it still possible the poor vertical at 900 was the result of not enough twist? PS: The bullet box label does say 8 twist but I just noticed that on Hornady's website they call for a 9 twist. [ 10-24-2003: Message edited by: Len Backus ] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist rate and bullet stability at 900 yards
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