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Long Range Hunting & Shooting
7mm vs. 7mm ultra mag?
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<blockquote data-quote="MontanaRifleman" data-source="post: 263413" data-attributes="member: 11717"><p>J E, you are more knowledgeble on the subject than I am, and for the most part I completely agree with you. But I have read numereous posts that the 300 WSM shows quite long barrel life, 4000+ rounds, and that the 7mm WSM which is very close to the same case has short barrel life 1000-2000 rounds. I find that very interesting. I wonder if that translates over to the RUM cartridges in 7mm and 300? From what I've read it doesn't seem to, at least not to a significant affect. My guess is that a 300 Rum shooting a 210 bullet will probaly slightly out last a 7mm RUM shooting a 180 bullet under similar conditions? Just a guess. It's been my impression that smaller bores in equal size cases burn out faster because they are concentrating that fire power in a smaler area. That may be an overly simplistic view of it. There is probably mor to it. And your assertion that shooting heavier bullets at lower velocities and better powder burn makes sense,</p><p> </p><p>Interestingly, GS claims their bullet design increases velocity withou increasing pressure and their design also facilitates the burn of powder over a longer and larger area of the bore resulting in less throat burning and overall cooler shooting temps.</p><p> </p><p><a href="http://www.gsgroup.co.za/faqbarrelwear.html" target="_blank">GS CUSTOM BULLETS - Barrel Wear</a></p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 263413, member: 11717"] J E, you are more knowledgeble on the subject than I am, and for the most part I completely agree with you. But I have read numereous posts that the 300 WSM shows quite long barrel life, 4000+ rounds, and that the 7mm WSM which is very close to the same case has short barrel life 1000-2000 rounds. I find that very interesting. I wonder if that translates over to the RUM cartridges in 7mm and 300? From what I've read it doesn't seem to, at least not to a significant affect. My guess is that a 300 Rum shooting a 210 bullet will probaly slightly out last a 7mm RUM shooting a 180 bullet under similar conditions? Just a guess. It's been my impression that smaller bores in equal size cases burn out faster because they are concentrating that fire power in a smaler area. That may be an overly simplistic view of it. There is probably mor to it. And your assertion that shooting heavier bullets at lower velocities and better powder burn makes sense, Interestingly, GS claims their bullet design increases velocity withou increasing pressure and their design also facilitates the burn of powder over a longer and larger area of the bore resulting in less throat burning and overall cooler shooting temps. [URL="http://www.gsgroup.co.za/faqbarrelwear.html"]GS CUSTOM BULLETS - Barrel Wear[/URL] [/QUOTE]
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7mm vs. 7mm ultra mag?
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