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Rifles, Reloading, Optics, Equipment
Reloading
Neck Tension
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<blockquote data-quote="bigedp51" data-source="post: 1723594" data-attributes="member: 28965"><p><span style="font-size: 18px"><span style="font-size: 15px">Bushing dies work best with with custom tight neck chambers and neck turned brass. If you have a off the shelf factory rifle with a SAAMI chamber and neck turn your brass the neck will have to expand even more. Meaning you end up working the neck even more reducing its diameter. And reducing the neck diameter .004 or more with a bushing die can induce neck runout. </span></span></p><p></p><p><span style="font-size: 18px"><span style="font-size: 15px">Below is a cutaway of a bushing die, the area marked in red is the section of the neck that is not sized. You can also see the clearance along the sides of the bushing. The bushing floats inside the die and the bushing can move from side to side and even tilt when sizing the neck and induce neck runout. So again a bushing die works best in tight neck chambers where the bushing does not have to reduce the neck diameter excessively. </span></span></p><p></p><p><span style="font-size: 18px"><span style="font-size: 15px"><img src="https://i.imgur.com/O5m9mBL.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></span></span></p><p></p><p><span style="font-size: 18px"><span style="font-size: 15px">Below Redding tells you if do not neck turn and the necks vary .002 or more to use the expander that comes with the Redding die.</span></span></p><p><span style="font-size: 18px"></span></p><p><span style="font-size: 18px"><span style="color: #0000b3"><strong>Tech Line & Tips (FAQs)</strong></span></span></p><p><span style="font-size: 18px"><span style="color: #0000b3"><strong><a href="https://www.redding-reloading.com/tech-line-a-tips-faqs/140-bushing-selection" target="_blank">Bushing Selection</a></strong></span></span></p><p><span style="color: #0000b3">"The methods of determining bushing size require that the cases being sized have a fairly uniform neck wall thickness or have been neck turned. If the neck wall thickness varies more than 0.002", it may be necessary to use a bushing a couple of thousandths smaller than your calculations indicate, and then use a size button in the die to determine the final inside neck diameter."</span></p><p></p><p>Bottom line, with a off the shelf factory rifle you may be better off with a Forster non-bushing die with a honed neck and reduced neck runout. And at the Whidden custom die website they tell you they get more concentric cases with non-bushing full length dies.</p><p></p><p>So if you do not have a neck thickness gauge and a runout gauge using a bushing die may not be to your advantage. Too much of what benchrest shooters do with their custom rifles does not apply to the average reloader with off the shelf factory rifles.</p></blockquote><p></p>
[QUOTE="bigedp51, post: 1723594, member: 28965"] [SIZE=5][SIZE=4]Bushing dies work best with with custom tight neck chambers and neck turned brass. If you have a off the shelf factory rifle with a SAAMI chamber and neck turn your brass the neck will have to expand even more. Meaning you end up working the neck even more reducing its diameter. And reducing the neck diameter .004 or more with a bushing die can induce neck runout. [/SIZE][/SIZE] [SIZE=5][SIZE=4]Below is a cutaway of a bushing die, the area marked in red is the section of the neck that is not sized. You can also see the clearance along the sides of the bushing. The bushing floats inside the die and the bushing can move from side to side and even tilt when sizing the neck and induce neck runout. So again a bushing die works best in tight neck chambers where the bushing does not have to reduce the neck diameter excessively. [/SIZE][/SIZE] [SIZE=5][SIZE=4][IMG]https://i.imgur.com/O5m9mBL.jpg[/IMG][/SIZE][/SIZE] [SIZE=5][SIZE=4]Below Redding tells you if do not neck turn and the necks vary .002 or more to use the expander that comes with the Redding die.[/SIZE][/SIZE] [SIZE=5] [COLOR=#0000b3][B]Tech Line & Tips (FAQs)[/B] [B][URL='https://www.redding-reloading.com/tech-line-a-tips-faqs/140-bushing-selection']Bushing Selection[/URL][/B][/COLOR][/SIZE] [COLOR=#0000b3]"The methods of determining bushing size require that the cases being sized have a fairly uniform neck wall thickness or have been neck turned. If the neck wall thickness varies more than 0.002", it may be necessary to use a bushing a couple of thousandths smaller than your calculations indicate, and then use a size button in the die to determine the final inside neck diameter."[/COLOR] Bottom line, with a off the shelf factory rifle you may be better off with a Forster non-bushing die with a honed neck and reduced neck runout. And at the Whidden custom die website they tell you they get more concentric cases with non-bushing full length dies. So if you do not have a neck thickness gauge and a runout gauge using a bushing die may not be to your advantage. Too much of what benchrest shooters do with their custom rifles does not apply to the average reloader with off the shelf factory rifles. [/QUOTE]
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