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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Badlands Precision Bullets thread - From BC to terminal ballistics
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<blockquote data-quote="Pdvdh" data-source="post: 2073944" data-attributes="member: 4191"><p>I think 0.035 - 0.040" off the lands (jump) is better than 0.010" jump.</p><p>Solid copper bullets engrave the rifling less easily than thin jacketed lead core bullets, I think it helps to have them hit the lands at a healthy run.</p><p>They say Barnes copper bullets do well with 0.050-0.060" jumps, and I think that's why. More consistent powder combustion, lower ES/SD when the bullet is moving when rifling engraving begins. My opinion.</p><p>Cory is running his 270gr .338 with even more jump. Like 0.065" jump.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 2073944, member: 4191"] I think 0.035 - 0.040" off the lands (jump) is better than 0.010" jump. Solid copper bullets engrave the rifling less easily than thin jacketed lead core bullets, I think it helps to have them hit the lands at a healthy run. They say Barnes copper bullets do well with 0.050-0.060" jumps, and I think that's why. More consistent powder combustion, lower ES/SD when the bullet is moving when rifling engraving begins. My opinion. Cory is running his 270gr .338 with even more jump. Like 0.065" jump. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Badlands Precision Bullets thread - From BC to terminal ballistics
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