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Rifles, Reloading, Optics, Equipment
Reloading
338 Bushing Siize
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<blockquote data-quote="Joel Russo" data-source="post: 771124" data-attributes="member: 6152"><p>Assuming you used a micrometer to measure as it is more accurate than a dial caliper. You would add .001" for spring back, which would net you .373". If you don't have a reamer print to cross reference, then take that measurement as the neck diameter in your chamber. In the larger .338's, I suggest between .005" and .008" of neck tension. You may want to order bushings .365", .366", .367" and .368". </p><p>I use the Wilson bushings over the Redding bushings as the Wilson's have a slight chamfer on the side that does not have the measurement stamp. The numbers go up in your die. I also suggest that you do not lock the bushing down in the die, but give it a bit of free play to help center itself as the neck of the case enters it.</p><p>You may also want to measure the neck wall thickness of your brass to see how consistent it is. If you have a variation of thickness then you will have a variation of neck tension. If it varies beyond your acceptable limits, then you may want to uniform the necks by neck turning.</p></blockquote><p></p>
[QUOTE="Joel Russo, post: 771124, member: 6152"] Assuming you used a micrometer to measure as it is more accurate than a dial caliper. You would add .001" for spring back, which would net you .373". If you don't have a reamer print to cross reference, then take that measurement as the neck diameter in your chamber. In the larger .338's, I suggest between .005" and .008" of neck tension. You may want to order bushings .365", .366", .367" and .368". I use the Wilson bushings over the Redding bushings as the Wilson's have a slight chamfer on the side that does not have the measurement stamp. The numbers go up in your die. I also suggest that you do not lock the bushing down in the die, but give it a bit of free play to help center itself as the neck of the case enters it. You may also want to measure the neck wall thickness of your brass to see how consistent it is. If you have a variation of thickness then you will have a variation of neck tension. If it varies beyond your acceptable limits, then you may want to uniform the necks by neck turning. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
338 Bushing Siize
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