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Rifles, Reloading, Optics, Equipment
Gunsmithing
Choosing Throat Angle for 338-06 Improved
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<blockquote data-quote="Bullet bumper" data-source="post: 661768" data-attributes="member: 17844"><p>Well in this case that depends on wether the throating reamer is larger than what you have now in the chamber end. If you have say a parallel .340 now but the free bore part of the reamer is only .338 then you could get a slight edge at the start of the throat . You really need to know exactly what dimentions you have now in the chamber and stay with the freebore diameter you have , so the reamer just polishes the diameter you have but not increasing the diameter by any real amount . It would not hurt much if it was say .338 now and the reamer scraped it to .339 but if it is already .340 now then you don't want it any larger . I would make a Cerrosafe cast of the chamber and measure that . Even if there is no real freebore there now , I don't really know , it gives you the diameters at the end of the chamber to know what you are working with . Then you can decide on the reamer diameter you need .</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 661768, member: 17844"] Well in this case that depends on wether the throating reamer is larger than what you have now in the chamber end. If you have say a parallel .340 now but the free bore part of the reamer is only .338 then you could get a slight edge at the start of the throat . You really need to know exactly what dimentions you have now in the chamber and stay with the freebore diameter you have , so the reamer just polishes the diameter you have but not increasing the diameter by any real amount . It would not hurt much if it was say .338 now and the reamer scraped it to .339 but if it is already .340 now then you don't want it any larger . I would make a Cerrosafe cast of the chamber and measure that . Even if there is no real freebore there now , I don't really know , it gives you the diameters at the end of the chamber to know what you are working with . Then you can decide on the reamer diameter you need . [/QUOTE]
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Choosing Throat Angle for 338-06 Improved
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