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X Bolt Max Long Range Hunter
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<blockquote data-quote="SMK1000plus" data-source="post: 1656059" data-attributes="member: 93846"><p>For a 7mm Rem Mag using very heavy high BC cup-n-core bullets, a twist rate of 1 in 8-1/2" to 1 in 8" is best for most shooting situations. Even the 162gr and 168gr cup-n-core bullets benefit from the 8-1/2" twist in very cold, low altitude environments as found during winter, in Canada and Alaska near coastal and island areas. The heaviest copper solids, i.e. some of the heavier 7mm Hammer Hunter bullets, which are quite excellent bullets by the way, require at least a 1 in 8" twist, and even faster when used in very cold low altitude environments.</p><p></p><p>I have six 7mm Rem Mags. Most of them still wear factory 1 in 9-1/2" twist barrels but, two of them have1 in 8" twist custom barrels. I also have quite a few 7mm-08s and even one 280 AI. For my personal preference in 7mm bullet selection and use, the 1 in 8" twist is the ideal twist rate.</p><p></p><p>On a side note, I have played around with 1 in 8" twist in 30 caliber, particularly in 300 Win Mag, and still have two heavy barreled rifles in that twist and chambering that I have yet to rebarrel to 1 in 9" twist. I have found that the 1 in 8" twist rate is just too much! My 1 in 8" twist 300 Win Mags torque like crazy when I"m using 212gr to 240gr cup-n-core bullets, particularly when velocities are approaching the upper limits. 1 in 9" twist in 300 Win Mag, and even in 30-06, is plenty twist for all but a few extra-heavy custom solids, in 30 caliber. Personally, I get my best accuracy in my 300 Win Mags and 30-06s with 1 in 9" twist barrels and have been slowly migrating all of them to that twist rate, as replacement barrels are needed. YMMV</p></blockquote><p></p>
[QUOTE="SMK1000plus, post: 1656059, member: 93846"] For a 7mm Rem Mag using very heavy high BC cup-n-core bullets, a twist rate of 1 in 8-1/2" to 1 in 8" is best for most shooting situations. Even the 162gr and 168gr cup-n-core bullets benefit from the 8-1/2" twist in very cold, low altitude environments as found during winter, in Canada and Alaska near coastal and island areas. The heaviest copper solids, i.e. some of the heavier 7mm Hammer Hunter bullets, which are quite excellent bullets by the way, require at least a 1 in 8" twist, and even faster when used in very cold low altitude environments. I have six 7mm Rem Mags. Most of them still wear factory 1 in 9-1/2" twist barrels but, two of them have1 in 8" twist custom barrels. I also have quite a few 7mm-08s and even one 280 AI. For my personal preference in 7mm bullet selection and use, the 1 in 8" twist is the ideal twist rate. On a side note, I have played around with 1 in 8" twist in 30 caliber, particularly in 300 Win Mag, and still have two heavy barreled rifles in that twist and chambering that I have yet to rebarrel to 1 in 9" twist. I have found that the 1 in 8" twist rate is just too much! My 1 in 8" twist 300 Win Mags torque like crazy when I"m using 212gr to 240gr cup-n-core bullets, particularly when velocities are approaching the upper limits. 1 in 9" twist in 300 Win Mag, and even in 30-06, is plenty twist for all but a few extra-heavy custom solids, in 30 caliber. Personally, I get my best accuracy in my 300 Win Mags and 30-06s with 1 in 9" twist barrels and have been slowly migrating all of them to that twist rate, as replacement barrels are needed. YMMV [/QUOTE]
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