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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
260 to 6.5-284 - is it worth it???
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<blockquote data-quote="Mikecr" data-source="post: 963459" data-attributes="member: 1521"><p>Gary, you're off in your velocity numbers in 26cal.</p><p>I shoot a 26wssm Imp, which holds right at the same H20 capacity as a 260AI. My barrel is 28".</p><p>My accuracy load is 47.4gr IMR4350, and well measured MV is ~3025fps with 139Laps/140VLDs.</p><p>I have tested this cartridge up to ~3200fps where FL sizing would just be req'd according to my blade mic.</p><p>With a decent chamber and enough barrel steel around it, I am certain a 6.5x284 can meet this and at lower pressures given it's capacity.</p><p></p><p>The real problem is ~3200fps is not very good for accuracy in ~140gr bullets.</p><p>So there is no better in bigger, and this reality is just what the 6.5x284 shooters come around to.</p><p>260AI capacity puts you right in the best known sweet spot with the most successful 26cal bullets.</p><p>~2950-3050 with ~140s</p><p>You're welcome to check it. Go to 1kyd BR sites and poll for it. </p><p></p><p>Oh, and nothing about the 308 case family is improved. They have always been improved -by us.</p><p>On velocity gains, who cares?</p><p>Accuracy, long term of it, is what matters. This is really what improving cartridges is about.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 963459, member: 1521"] Gary, you're off in your velocity numbers in 26cal. I shoot a 26wssm Imp, which holds right at the same H20 capacity as a 260AI. My barrel is 28". My accuracy load is 47.4gr IMR4350, and well measured MV is ~3025fps with 139Laps/140VLDs. I have tested this cartridge up to ~3200fps where FL sizing would just be req'd according to my blade mic. With a decent chamber and enough barrel steel around it, I am certain a 6.5x284 can meet this and at lower pressures given it's capacity. The real problem is ~3200fps is not very good for accuracy in ~140gr bullets. So there is no better in bigger, and this reality is just what the 6.5x284 shooters come around to. 260AI capacity puts you right in the best known sweet spot with the most successful 26cal bullets. ~2950-3050 with ~140s You're welcome to check it. Go to 1kyd BR sites and poll for it. Oh, and nothing about the 308 case family is improved. They have always been improved -by us. On velocity gains, who cares? Accuracy, long term of it, is what matters. This is really what improving cartridges is about. [/QUOTE]
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260 to 6.5-284 - is it worth it???
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