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Long Range Hunting & Shooting
Roy,,270AM question
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<blockquote data-quote="Fiftydriver" data-source="post: 153545" data-attributes="member: 10"><p>We can build a lighter weight sporter, no problem at all. Thing to keep in mind is that these rounds produce a high degree of barrel stress when you drive a bullet of this weight and length to these velocities in a fast twist barrel.</p><p></p><p>As such, there is nothing wrong with a shorter length barrel. Even in a 27" pipe they work very well, of course there will be a big of velocity lose but if portability is more important then 75 to 100 fps at most, then why not.</p><p></p><p>One example is with my two 7mm AMs, one is a 9.5 lb lightweight with 27" #3 Lilja barrel, the other is a 15.5 lb semi heavy rifle with a 30" Rock barrel.</p><p></p><p>The 27" barrel will top out around 3200 fps with the 200 gr ULD RBBT, I load to 3150 just to be comfortable. The 30" barrel will do 3350 fps pretty easily but again I load a bit off max at just shy of 3300 fps.</p><p></p><p>I have never felt lacking with the shorter barreled rifle and used it to take 6 head of big game past 650 yards last year in 7 shots.</p><p></p><p>Barrel length is nice on an open country rifle, for a more general purpose rifle, there is nothing at all wrong with a 27-28" pipe with any of my conventional sized Allen Magnums.</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 153545, member: 10"] We can build a lighter weight sporter, no problem at all. Thing to keep in mind is that these rounds produce a high degree of barrel stress when you drive a bullet of this weight and length to these velocities in a fast twist barrel. As such, there is nothing wrong with a shorter length barrel. Even in a 27" pipe they work very well, of course there will be a big of velocity lose but if portability is more important then 75 to 100 fps at most, then why not. One example is with my two 7mm AMs, one is a 9.5 lb lightweight with 27" #3 Lilja barrel, the other is a 15.5 lb semi heavy rifle with a 30" Rock barrel. The 27" barrel will top out around 3200 fps with the 200 gr ULD RBBT, I load to 3150 just to be comfortable. The 30" barrel will do 3350 fps pretty easily but again I load a bit off max at just shy of 3300 fps. I have never felt lacking with the shorter barreled rifle and used it to take 6 head of big game past 650 yards last year in 7 shots. Barrel length is nice on an open country rifle, for a more general purpose rifle, there is nothing at all wrong with a 27-28" pipe with any of my conventional sized Allen Magnums. Kirby Allen(50) [/QUOTE]
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Roy,,270AM question
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