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Rifles, Reloading, Optics, Equipment
Reloading
How do you straighten runout?
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<blockquote data-quote="SBruce" data-source="post: 486919" data-attributes="member: 21068"><p>There is alot of good info in the above posts for you to ponder on, and sorting by neck thickness does help quite a bit, even with standard dies. Keeping the neck tension at about .002 or a little less seems to help some too, or at least it has for me.</p><p> </p><p>Neco does make a block with different sized holes in it for different calibers. The idea is that if you find a cartridge with over .003 run out on the bullet right in front of the case, you place the bullet into the block (high side up) and gently press down on the case. In effect, bending it back to strait. According to my Sinclair concentricity gauge, it does straighten out some runout, but I have to be carefull of over doing it, because it will go from .004 one way to .004 the other way with too much force.</p><p> </p><p>My great uncle was a benchrester quite some time back, he had some sort of straightener for runout too, but it worked more like an arrow straightener and the cartridge laid between two points and the tool was used to press down on the neck when the high side was up. This particular tool utilized a dial indicator that was included. I don't know much more about it, and he passed away over 15 years ago.?</p><p> </p><p>With the Neco block, I have to put the round back into the concentricity gauge to tell if I did it enough or not enough and go from there.</p></blockquote><p></p>
[QUOTE="SBruce, post: 486919, member: 21068"] There is alot of good info in the above posts for you to ponder on, and sorting by neck thickness does help quite a bit, even with standard dies. Keeping the neck tension at about .002 or a little less seems to help some too, or at least it has for me. Neco does make a block with different sized holes in it for different calibers. The idea is that if you find a cartridge with over .003 run out on the bullet right in front of the case, you place the bullet into the block (high side up) and gently press down on the case. In effect, bending it back to strait. According to my Sinclair concentricity gauge, it does straighten out some runout, but I have to be carefull of over doing it, because it will go from .004 one way to .004 the other way with too much force. My great uncle was a benchrester quite some time back, he had some sort of straightener for runout too, but it worked more like an arrow straightener and the cartridge laid between two points and the tool was used to press down on the neck when the high side was up. This particular tool utilized a dial indicator that was included. I don't know much more about it, and he passed away over 15 years ago.? With the Neco block, I have to put the round back into the concentricity gauge to tell if I did it enough or not enough and go from there. [/QUOTE]
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How do you straighten runout?
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