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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5mm - 25cal = .007"
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<blockquote data-quote="ImBillT" data-source="post: 3082132" data-attributes="member: 117715"><p>Yes exactly. They're practically the same. Thats my point.</p><p></p><p>As far as your friend's velocity results, it's likely that he just has a fast barrel. A drop of only 5 grains shouldn't result in a 25CM beating a 6.5CM by 100fps. It's a shame there isn't good data for both cartridges out there.</p><p></p><p>From Nosler</p><p>25-06 120gr 3177fps</p><p>6.5-06 120gr 3294fps</p><p></p><p>257Rob +P 120gr 2817fps</p><p>260Rem. 120gr. 3050fps.</p><p></p><p>The extra .007" is SLIGHTLY more efficient. BC's of same weight bullets will be SLIGHTLY better for 25. THEYRE BASICALLY THE SAME. That's all my point ever was. I did have a problem with the claim that a 25CM can beat a 6.5CM by 100fps when only dropping bullet weight by 5gr. That's very unlikely on the average. One rifle vs one other rifle, it could definitely happen. On the average, I would guess they'd be mush closer together.</p></blockquote><p></p>
[QUOTE="ImBillT, post: 3082132, member: 117715"] Yes exactly. They're practically the same. Thats my point. As far as your friend's velocity results, it's likely that he just has a fast barrel. A drop of only 5 grains shouldn't result in a 25CM beating a 6.5CM by 100fps. It's a shame there isn't good data for both cartridges out there. From Nosler 25-06 120gr 3177fps 6.5-06 120gr 3294fps 257Rob +P 120gr 2817fps 260Rem. 120gr. 3050fps. The extra .007" is SLIGHTLY more efficient. BC's of same weight bullets will be SLIGHTLY better for 25. THEYRE BASICALLY THE SAME. That's all my point ever was. I did have a problem with the claim that a 25CM can beat a 6.5CM by 100fps when only dropping bullet weight by 5gr. That's very unlikely on the average. One rifle vs one other rifle, it could definitely happen. On the average, I would guess they’d be mush closer together. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5mm - 25cal = .007"
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