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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
260 AI or 6.5 PRC?
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<blockquote data-quote="Hugnot" data-source="post: 2761268" data-attributes="member: 115658"><p>Bolt thrust force would be a function of area of cartridge base & pressure, like, .18 square inches for .260 AI compared to .22 square inches for 6.5 PRC. Assuming equal pressures were applied to the base of the cartridge more force or bolt thrust would happen with the 6.5PRC - more square inches. This might cause "clickers" that are a 6.5 PRC annoyance.</p><p></p><p>I use the cheap Lee collet dies - intended for neck sizing - as expander dies for my brass that has turned necks and sized with F/L dies that have had the expander/decap removed. The cheap Lee collet dies work just fine with AI brass - like 6mm Rem Lee collet die used to neck size 6mm AI - provided no contact with brass at body/shoulder - zippo run out. Using the cheap Lee collet die intended for a .260 Rem on some fat 6.5 magnum cartridge having the same length might be a problem.</p><p></p><p>No Remington bolt replacement with .260 AI.</p><p></p><p>For about a 7% gain in velocity the 6.5PRC would be a no go for me. Add the crazy high 6.5 PRC brass prices and availability problems.</p><p></p><p>A .260 AI size die would be one time buy. I would try for a F/L bushing die having a .288 +- .001 bushing depending on chamber. Universal 6.5-seater die would work.</p><p></p><p>If Hornady & others want to make the 6.5 PRC a big deal they need to produce more brass to increase availability & lower price. 200 rounds of 6.5 PRC brass would be pricy.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2761268, member: 115658"] Bolt thrust force would be a function of area of cartridge base & pressure, like, .18 square inches for .260 AI compared to .22 square inches for 6.5 PRC. Assuming equal pressures were applied to the base of the cartridge more force or bolt thrust would happen with the 6.5PRC - more square inches. This might cause "clickers" that are a 6.5 PRC annoyance. I use the cheap Lee collet dies - intended for neck sizing - as expander dies for my brass that has turned necks and sized with F/L dies that have had the expander/decap removed. The cheap Lee collet dies work just fine with AI brass - like 6mm Rem Lee collet die used to neck size 6mm AI - provided no contact with brass at body/shoulder - zippo run out. Using the cheap Lee collet die intended for a .260 Rem on some fat 6.5 magnum cartridge having the same length might be a problem. No Remington bolt replacement with .260 AI. For about a 7% gain in velocity the 6.5PRC would be a no go for me. Add the crazy high 6.5 PRC brass prices and availability problems. A .260 AI size die would be one time buy. I would try for a F/L bushing die having a .288 +- .001 bushing depending on chamber. Universal 6.5-seater die would work. If Hornady & others want to make the 6.5 PRC a big deal they need to produce more brass to increase availability & lower price. 200 rounds of 6.5 PRC brass would be pricy. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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260 AI or 6.5 PRC?
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