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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5mm - 25cal = .007"
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<blockquote data-quote="vhr1079" data-source="post: 3072995" data-attributes="member: 118395"><p>If I were starting from scratch, I'd pick 25 cal over 6mm or 6.5 for a short action cartridge. If you compare using modern bullets, there are advantages on both ends of the ballistic spectrum - in velocity and in BC. Here's a quick comparison for reference:</p><p></p><p>[ATTACH=full]558998[/ATTACH]</p><p></p><p>I used conservative velocities here, at 5000ft elevation, 50 degrees, 60% humidity, 30.01Hg</p><p></p><p>It requires a 3000 fps MV (6.5 PRC speeds) from the 6.5 to have similar energy to the 135 Hyb in 25 Creedmoor.</p></blockquote><p></p>
[QUOTE="vhr1079, post: 3072995, member: 118395"] If I were starting from scratch, I'd pick 25 cal over 6mm or 6.5 for a short action cartridge. If you compare using modern bullets, there are advantages on both ends of the ballistic spectrum - in velocity and in BC. Here's a quick comparison for reference: [ATTACH type="full" alt="Screenshot 2024-03-29 151422.jpg"]558998[/ATTACH] I used conservative velocities here, at 5000ft elevation, 50 degrees, 60% humidity, 30.01Hg It requires a 3000 fps MV (6.5 PRC speeds) from the 6.5 to have similar energy to the 135 Hyb in 25 Creedmoor. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5mm - 25cal = .007"
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