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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
30-06 vs. 30-378
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<blockquote data-quote="hemiford" data-source="post: 928376" data-attributes="member: 72104"><p>In this post I am touching on several BIG topics, but I'll try to sum them</p><p>up with one question. </p><p></p><p>22" barrel length is common to many 30-06 rifles. Since a 30-378 Wby</p><p>has very close to twice the powder capacity, why doesn't a 30-378 rifle</p><p>have a 44" barrel ?? This would give each rifle the same expansion ratio.</p><p></p><p>???</p><p></p><p>On a side note, this should also give the 30-378 bullet about 1.414 times</p><p>the muzzle velocity of the 30-06 (same bullet weight). </p><p>I.E., 3800 fps vs. 2700 fps.</p><p></p><p>I have done a lot searching to find graphs of the internal pressure traces</p><p>of large capacity cartridges, to compare with a typical 30-06 pressure trace,</p><p>and have not found good comparative results. </p><p></p><p>I have done this with gasoline engines and compression ratio, which is a </p><p>VERY similar situation.</p><p></p><p>Aside from the inconvenience of carrying around a very long barrel, I see</p><p>this as a simple engineering exercise in scaling.</p></blockquote><p></p>
[QUOTE="hemiford, post: 928376, member: 72104"] In this post I am touching on several BIG topics, but I'll try to sum them up with one question. 22" barrel length is common to many 30-06 rifles. Since a 30-378 Wby has very close to twice the powder capacity, why doesn't a 30-378 rifle have a 44" barrel ?? This would give each rifle the same expansion ratio. ??? On a side note, this should also give the 30-378 bullet about 1.414 times the muzzle velocity of the 30-06 (same bullet weight). I.E., 3800 fps vs. 2700 fps. I have done a lot searching to find graphs of the internal pressure traces of large capacity cartridges, to compare with a typical 30-06 pressure trace, and have not found good comparative results. I have done this with gasoline engines and compression ratio, which is a VERY similar situation. Aside from the inconvenience of carrying around a very long barrel, I see this as a simple engineering exercise in scaling. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
30-06 vs. 30-378
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