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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What Twist For 6.5 Barrel?
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<blockquote data-quote="Hugnot" data-source="post: 1997588" data-attributes="member: 115658"><p>Light weight? My skinny barrels also stop grouping well when they get hot. I usually shoot the first 2-3 then cool off the barrel with damp paper towels then resume shooting.</p><p></p><p>Measure your bullet lengths then go on-line to the Berger site and look up the twist/stability calculator and run it for your 7.5 twist barrel. I think the 7.5 twist is a real good twist rate for a 6.5 as it seems like 6.5 bullets are getting more pointy and longer and heavier. The 7.5 twist should also do well with 120's.</p><p></p><p>My 8 twist 6.5's do well with bullets weighing 100-140 grains but some of the longer 140's have marginal stability. Huge spin rates reveal any bullet imbalance but most bullets that are made today are very precise allowing shorter and lighter bullets to be accurate when used in fast twist barrels. My go to powder(s) for my .260 with 130's are H4350 or RL16 - use at 20* to over 90*.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 1997588, member: 115658"] Light weight? My skinny barrels also stop grouping well when they get hot. I usually shoot the first 2-3 then cool off the barrel with damp paper towels then resume shooting. Measure your bullet lengths then go on-line to the Berger site and look up the twist/stability calculator and run it for your 7.5 twist barrel. I think the 7.5 twist is a real good twist rate for a 6.5 as it seems like 6.5 bullets are getting more pointy and longer and heavier. The 7.5 twist should also do well with 120's. My 8 twist 6.5's do well with bullets weighing 100-140 grains but some of the longer 140's have marginal stability. Huge spin rates reveal any bullet imbalance but most bullets that are made today are very precise allowing shorter and lighter bullets to be accurate when used in fast twist barrels. My go to powder(s) for my .260 with 130's are H4350 or RL16 - use at 20* to over 90*. [/QUOTE]
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What Twist For 6.5 Barrel?
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