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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Chamber neck dimention for 6.5-06
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<blockquote data-quote="Bullet bumper" data-source="post: 862534" data-attributes="member: 17844"><p>OK there is many issues being discussed here and lots of confusion.</p><p> </p><p>1/ When you form a case down any imperfections or excess brass flows to the inside of the neck so many see inside neck reaming as the best option to get an even wall thickness and straight neck .</p><p> </p><p>2/ When you expand up it's the opposite as most imperfection flows out so outside neck turning is the best to bring it back to external specs. </p><p> </p><p>You have not said anything about what you intend to use the gun for as that would determine if you would even want or need a tight neck chamber .</p><p> </p><p>When you expand up to form a case for a tight neck chamber you have to make sure that the resulting brass thickness can be turned to the diameter you choose .</p><p> </p><p>So the chamber dimension has to match what the brass can turn to with respect to not going too thin . </p><p> </p><p>284 has the right idea . Make up a formed case or two the way you think you like and then dummy load the bullet you will mainly use to correct OAL and send that off to get a reamer made to suit . </p><p>You can also decide if you want a tight base chamber , what distance the bullet ogive will be from the lands or even a tighter neck , so you can turn a bit more off the necks if you want . Conserving brass thickness is a good idea but not at the expense of concentricity and straightness .</p><p> </p><p>You have to decide on the way you will form the case , get the gear to do that and then produce the dummy rounds after that the reamer makers should be able to advise you on the best way to proceed . </p><p> </p><p>Dies are another issue but if you went Lee collet die for neck size the diameter difference would not be an issue if you can buy one . Failing that a bushing type die.</p><p>If you go standard factory 30-06 base Redding should have a 6.5 - 06 body die to handle that I would think as I have never bought one but if they don't a 25-06 with the neck drilled out a bit more (.008 more ) should do it. </p><p> </p><p>You will have to work out what you expect the cartridge to do . </p><p>It's a complicated subject with many different side tracks and you picked a hard cartridge to work with. .</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 862534, member: 17844"] OK there is many issues being discussed here and lots of confusion. 1/ When you form a case down any imperfections or excess brass flows to the inside of the neck so many see inside neck reaming as the best option to get an even wall thickness and straight neck . 2/ When you expand up it's the opposite as most imperfection flows out so outside neck turning is the best to bring it back to external specs. You have not said anything about what you intend to use the gun for as that would determine if you would even want or need a tight neck chamber . When you expand up to form a case for a tight neck chamber you have to make sure that the resulting brass thickness can be turned to the diameter you choose . So the chamber dimension has to match what the brass can turn to with respect to not going too thin . 284 has the right idea . Make up a formed case or two the way you think you like and then dummy load the bullet you will mainly use to correct OAL and send that off to get a reamer made to suit . You can also decide if you want a tight base chamber , what distance the bullet ogive will be from the lands or even a tighter neck , so you can turn a bit more off the necks if you want . Conserving brass thickness is a good idea but not at the expense of concentricity and straightness . You have to decide on the way you will form the case , get the gear to do that and then produce the dummy rounds after that the reamer makers should be able to advise you on the best way to proceed . Dies are another issue but if you went Lee collet die for neck size the diameter difference would not be an issue if you can buy one . Failing that a bushing type die. If you go standard factory 30-06 base Redding should have a 6.5 - 06 body die to handle that I would think as I have never bought one but if they don't a 25-06 with the neck drilled out a bit more (.008 more ) should do it. You will have to work out what you expect the cartridge to do . It's a complicated subject with many different side tracks and you picked a hard cartridge to work with. . [/QUOTE]
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Chamber neck dimention for 6.5-06
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