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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Real difference...in barrels..
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<blockquote data-quote="Fiftydriver" data-source="post: 194480" data-attributes="member: 10"><p>Joe,</p><p> </p><p>On average, the lighter the contour of the barrel, the shorter you want to limits overall length to retain as much barrel stiffness as possible. For example, if you take a lilja #3 contour and have it in a 30" length chambered in say 7mm WSM and then take the same contour barrel and fit it to an XP-100 handgun with a 15" barrel length. In most every case, I would bet the handgun would far out shoot the 30" barrel as far as shear group size.</p><p> </p><p>That said, how much difference would there be with same length barrel stepping up or down in barrel contour, in my opinion, not a hell of a lot if the barrel is a good one and the work on the barrel is properly done.</p><p> </p><p>What you will find and this is why most believe that lighter contour barrels are not as accurate as heavier contour is simply because a lighter rifle is more difficult to shoot accurately then a heavier rifle.</p><p> </p><p>It just takes more of a pilot to shoot a light weight rifle compared to one that will sit there basically on its own.</p><p> </p><p>That said, it also depends on barrel length, chambering, stock choices, twist rate, bullet length and velocity potential. The farther to the extreme you get in performance, the more stress there is imposed on the entire rifle project.</p><p> </p><p>For example, you take a 200 gr ULD RBBT 7mm bullet and load it to 3350 fps and compare it to a 160 gr Accubond loaded to 3000 fps, the former bullet will impose dramatically more stress on any barrel when it passes down the bore, as such, a larger cross section barrel will always help control this better then a smaller contour barrel.</p><p> </p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 194480, member: 10"] Joe, On average, the lighter the contour of the barrel, the shorter you want to limits overall length to retain as much barrel stiffness as possible. For example, if you take a lilja #3 contour and have it in a 30" length chambered in say 7mm WSM and then take the same contour barrel and fit it to an XP-100 handgun with a 15" barrel length. In most every case, I would bet the handgun would far out shoot the 30" barrel as far as shear group size. That said, how much difference would there be with same length barrel stepping up or down in barrel contour, in my opinion, not a hell of a lot if the barrel is a good one and the work on the barrel is properly done. What you will find and this is why most believe that lighter contour barrels are not as accurate as heavier contour is simply because a lighter rifle is more difficult to shoot accurately then a heavier rifle. It just takes more of a pilot to shoot a light weight rifle compared to one that will sit there basically on its own. That said, it also depends on barrel length, chambering, stock choices, twist rate, bullet length and velocity potential. The farther to the extreme you get in performance, the more stress there is imposed on the entire rifle project. For example, you take a 200 gr ULD RBBT 7mm bullet and load it to 3350 fps and compare it to a 160 gr Accubond loaded to 3000 fps, the former bullet will impose dramatically more stress on any barrel when it passes down the bore, as such, a larger cross section barrel will always help control this better then a smaller contour barrel. Kirby Allen(50) [/QUOTE]
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Real difference...in barrels..
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