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Rifles, Reloading, Optics, Equipment
Reloading
Need some advice
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<blockquote data-quote="Ackley Man" data-source="post: 270799" data-attributes="member: 16583"><p>Man I cannot believe all of the guys that are so worked up over this neck turning thing. It is really simple. If you have a standard SAMI spec chambered barrel, regardless of if it came on a factory gun or was a gun re-barreled by a gunsmith, to do anything other than cut off the high spots to help uniform neck tension is like trying to make a silk purse from a sows ear. Why the hell would anyone want to increase the distance from the chamber wall in the neck area and invite more room for error? For testing purposes we have culled brass by neck thickness in groups of 10 cases and shot 4 different cull goups the same day. The target group size was not impacted one bit so long as the neck tension and run out was closely controlled. It would be a much better use of time to do two other things, 1- determine the length from the bolt face to the start of the lands and then work with varied seating depths to obtain maximum accuracy and 2- use a concentricity gague to check bullet run out and make the necessary corrections. All this crap about "turning necks does this and that" is an excercise in frutility unless you are doing it for a tight neck chamber. If the variance in the case neck wall is so bad that you can't cull enough pieces for uniformity within a grand or so - throw the brass in the garbage can and buy some new Norma, Nosler or other low tolerance brass. I've only run into one batch of Winchester or Remington brass with really big variances in neck wall thickness in 30 years. Finally, any one who would pay to have a non match grade barrel tight necked chambered is a knucklehead. Anyone who would buy such a gun is a bigger knucklehead and any gunsmith that would recommend it should have his head examined.</p></blockquote><p></p>
[QUOTE="Ackley Man, post: 270799, member: 16583"] Man I cannot believe all of the guys that are so worked up over this neck turning thing. It is really simple. If you have a standard SAMI spec chambered barrel, regardless of if it came on a factory gun or was a gun re-barreled by a gunsmith, to do anything other than cut off the high spots to help uniform neck tension is like trying to make a silk purse from a sows ear. Why the hell would anyone want to increase the distance from the chamber wall in the neck area and invite more room for error? For testing purposes we have culled brass by neck thickness in groups of 10 cases and shot 4 different cull goups the same day. The target group size was not impacted one bit so long as the neck tension and run out was closely controlled. It would be a much better use of time to do two other things, 1- determine the length from the bolt face to the start of the lands and then work with varied seating depths to obtain maximum accuracy and 2- use a concentricity gague to check bullet run out and make the necessary corrections. All this crap about "turning necks does this and that" is an excercise in frutility unless you are doing it for a tight neck chamber. If the variance in the case neck wall is so bad that you can't cull enough pieces for uniformity within a grand or so - throw the brass in the garbage can and buy some new Norma, Nosler or other low tolerance brass. I've only run into one batch of Winchester or Remington brass with really big variances in neck wall thickness in 30 years. Finally, any one who would pay to have a non match grade barrel tight necked chambered is a knucklehead. Anyone who would buy such a gun is a bigger knucklehead and any gunsmith that would recommend it should have his head examined. [/QUOTE]
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