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Hunting
Long Range Hunting & Shooting
7 mm lrm
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<blockquote data-quote="Guinness" data-source="post: 962268" data-attributes="member: 30844"><p>Since I don't have the background a lot of these folks do I won't go into any detail but I think the reason the 7mm RUM isn't considered too often is because it is somewhat (significantly?) overbore. In other words, the case holds more powder than can be efficiently burnt in a 7mm bore barrel even if the barrel is 28+ inches long. The increased performance of the 7mm RUM comes at a cost as the overbore decreases the life of the barrel, at the throat, more rapidly than other more efficient chamberings. From the research I've conducted it seems the performance vs barrel wear isn't a worthwhile tradeoff unless you really want, or need, every last fps of muzzle velocity.</p></blockquote><p></p>
[QUOTE="Guinness, post: 962268, member: 30844"] Since I don't have the background a lot of these folks do I won't go into any detail but I think the reason the 7mm RUM isn't considered too often is because it is somewhat (significantly?) overbore. In other words, the case holds more powder than can be efficiently burnt in a 7mm bore barrel even if the barrel is 28+ inches long. The increased performance of the 7mm RUM comes at a cost as the overbore decreases the life of the barrel, at the throat, more rapidly than other more efficient chamberings. From the research I've conducted it seems the performance vs barrel wear isn't a worthwhile tradeoff unless you really want, or need, every last fps of muzzle velocity. [/QUOTE]
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