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Rifles, Reloading, Optics, Equipment
7mm STW
Adding a brake
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<blockquote data-quote="Timber338" data-source="post: 1043437" data-attributes="member: 33822"><p>JE Custom, you commented on how factory barrels are rarely concentric. That doesn't suprise me at all. So I wanted to pass on this experience I had to highlight how important it is to have the right gunsmith install a brake.</p><p></p><p>On my most recent full custom 338 RUM, I had a 4-port muscle brake installed. The gunsmith informed me that my barrel was a full .006" from the center of my bore. He was very surprised by this. I personally have no reference one way or another with any barrel, regardless of factory or custom, so I assume .006" is not typical for a custom barrel, and maybe even worse than the average factory barrel.</p><p></p><p>Anyways, the point is that the gunsmith did an excellent job at identifying the concentricity problem, and he cut the threads accordingly to the true bore center. Had he used a tap the job would not have turned out as well. </p><p></p><p>and JE, just like you mentioned, it was more work to blend the brake to the barrel. The gunsmith really did an excellent job, but if you look very close you can see exactly where he had to do some careful blend work to make it look good.</p><p></p><p>And now the rifle is a true 1/4 MOA shooter, and I have no doubt that is partly due to the correct installation of the brake. And in terms of accuracy, it sure doesn't seem to matter that the bore is not perfectly concentric to the outside profile of the barrel.</p></blockquote><p></p>
[QUOTE="Timber338, post: 1043437, member: 33822"] JE Custom, you commented on how factory barrels are rarely concentric. That doesn't suprise me at all. So I wanted to pass on this experience I had to highlight how important it is to have the right gunsmith install a brake. On my most recent full custom 338 RUM, I had a 4-port muscle brake installed. The gunsmith informed me that my barrel was a full .006" from the center of my bore. He was very surprised by this. I personally have no reference one way or another with any barrel, regardless of factory or custom, so I assume .006" is not typical for a custom barrel, and maybe even worse than the average factory barrel. Anyways, the point is that the gunsmith did an excellent job at identifying the concentricity problem, and he cut the threads accordingly to the true bore center. Had he used a tap the job would not have turned out as well. and JE, just like you mentioned, it was more work to blend the brake to the barrel. The gunsmith really did an excellent job, but if you look very close you can see exactly where he had to do some careful blend work to make it look good. And now the rifle is a true 1/4 MOA shooter, and I have no doubt that is partly due to the correct installation of the brake. And in terms of accuracy, it sure doesn't seem to matter that the bore is not perfectly concentric to the outside profile of the barrel. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
Adding a brake
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