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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5-300wby or 6.5-300wm?
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<blockquote data-quote="benchracer" data-source="post: 1081132" data-attributes="member: 22069"><p>With the off-the-shelf choices currently available, I don't believe either of the mentioned wildcats are the way to go. If you want that level of case capacity in a 6.5, the 26 Nosler would be a better and easier choice. However, the tradeoff for going that route involves more than barrel life. I am seeing reports of shootability issues as case capacity increases, such as a tendency toward pressure spikes in the 26 Nosler.</p><p> </p><p>I own a .264 Win Mag. Even though it has less case capacity than the cartridges you are considering (and the 26 Nosler), it is still a VERY overbore cartridge that does its best work with some of the slowest powders in existence. Based on my experience with it, I don't find the idea of even more case capacity to be very appealing. I am very fond of my .264, but I feel it is right at the practical capacity limit for the 6.5 bore size.</p><p> </p><p>If more speed than the 3150-3200, that is typical of the .264 with 140 class bullets, is desired, lighter monometal bullets (and/or longer barrels) may be a better answer than more case capacity. For example, I would expect it to be possible to safely push a Cutting Edge 130 MTH (with a 550 G1 bc) to 3450ish from a 26" barrel with a .264 Win Mag class cartridge.</p><p> </p><p>I would expect cartridges like the 6.5 SAUM and 6.5 SS (Sherman Short) to be able to deliver similar performance.</p></blockquote><p></p>
[QUOTE="benchracer, post: 1081132, member: 22069"] With the off-the-shelf choices currently available, I don't believe either of the mentioned wildcats are the way to go. If you want that level of case capacity in a 6.5, the 26 Nosler would be a better and easier choice. However, the tradeoff for going that route involves more than barrel life. I am seeing reports of shootability issues as case capacity increases, such as a tendency toward pressure spikes in the 26 Nosler. I own a .264 Win Mag. Even though it has less case capacity than the cartridges you are considering (and the 26 Nosler), it is still a VERY overbore cartridge that does its best work with some of the slowest powders in existence. Based on my experience with it, I don't find the idea of even more case capacity to be very appealing. I am very fond of my .264, but I feel it is right at the practical capacity limit for the 6.5 bore size. If more speed than the 3150-3200, that is typical of the .264 with 140 class bullets, is desired, lighter monometal bullets (and/or longer barrels) may be a better answer than more case capacity. For example, I would expect it to be possible to safely push a Cutting Edge 130 MTH (with a 550 G1 bc) to 3450ish from a 26" barrel with a .264 Win Mag class cartridge. I would expect cartridges like the 6.5 SAUM and 6.5 SS (Sherman Short) to be able to deliver similar performance. [/QUOTE]
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6.5-300wby or 6.5-300wm?
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