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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
REM 700 6.5x55 Swede cold barrel groups. . .
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<blockquote data-quote="Bart B" data-source="post: 1149917" data-attributes="member: 5302"><p>Most of the time shot stringing as the barrel heats up is caused by the fit of the barrel to the receiver. If the receiver face isn't square with its barrel tenon thread axis, the barrel shoulder will fit tight at one point around its contact surface. As the barrel and receiver expand a bit from heating, more stress is put on the barrel at that point which bends it. And that moves the bore axis at the muzzle in some direction from where it points when cold.</p><p></p><p>It can be fixed by having a 'smith properly face the receiver back .005 to .010 inch, then put a shim that thick between it and the receiver when clocked back in to maintain headspace. I've seen this done many times; always worked very well.</p><p></p><p>If that doesn't fix the problem, then the barrel's not properly stress relieved.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1149917, member: 5302"] Most of the time shot stringing as the barrel heats up is caused by the fit of the barrel to the receiver. If the receiver face isn't square with its barrel tenon thread axis, the barrel shoulder will fit tight at one point around its contact surface. As the barrel and receiver expand a bit from heating, more stress is put on the barrel at that point which bends it. And that moves the bore axis at the muzzle in some direction from where it points when cold. It can be fixed by having a 'smith properly face the receiver back .005 to .010 inch, then put a shim that thick between it and the receiver when clocked back in to maintain headspace. I've seen this done many times; always worked very well. If that doesn't fix the problem, then the barrel's not properly stress relieved. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
REM 700 6.5x55 Swede cold barrel groups. . .
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