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Rifles, Reloading, Optics, Equipment
Reloading
Who neck turns their brass
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<blockquote data-quote="SBruce" data-source="post: 715313" data-attributes="member: 21068"><p>It's usually safe to assume about .001 springback after firing. Meaning a .276 chamber neck will give .275 fired case necks. If loaded rounds are .275 then you've maybe only got .001 clearance or .0005" all the way around the loaded neck/bullet before it's fired.</p><p> </p><p>In a stricly competition gun that is kept squeaky clean, that would maybe work if you didn't want to resize cases......fitted neck gun is the term I've heard........I bet you need a press to seat bullets (without sizing first)...... they probably wont seat with your fingers??</p><p> </p><p>If that's the case, and it's a hunting gun that might get a little dirty between cleanings, I'd clean up (or turn down) the necks a little. Shouldn't take much, maybe .0005 to .0008 off the current neck thickness. Whatever you take off will be double by time you go full circle. After you turn necks, the tension on a loaded round will decrease unless you change bushing size in the resize die. You may have a tight enough bushing or die neck already, so this might not apply in your case.</p><p> </p><p>If you dont want to turn the necks, a gunsmith can sometimes ream out the chamber neck just a touch. Or, you could try a different brand of brass that has thinner necks to begin with. If you've never turned necks, you can be in for quite a little expense with expander mandrels, turning mandrels, power case drivers, case holders, neck turner and cutters, tubing or neck thickness micrometers, ect. They are all necessary to turn a high volume of cases to within tight tolerances.</p><p> </p><p>Sinclair International is a great place to get neck turning equipment IMO. Most of the customer service people know what they are talking about and are very helpful.</p><p> </p><p>Just my opinion, but most rifles that are capable, don't need neck turning for 1/2 MOA groups, 1/2 minute and even better should come easy with good rifles and decent handloads/load development. But.........If we are after sub 1/4 MOA and better all the time, that's when we take off the high spots, or get tight neck chambers and turn down brass.</p><p> </p><p>Good Luck<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="SBruce, post: 715313, member: 21068"] It's usually safe to assume about .001 springback after firing. Meaning a .276 chamber neck will give .275 fired case necks. If loaded rounds are .275 then you've maybe only got .001 clearance or .0005" all the way around the loaded neck/bullet before it's fired. In a stricly competition gun that is kept squeaky clean, that would maybe work if you didn't want to resize cases......fitted neck gun is the term I've heard........I bet you need a press to seat bullets (without sizing first)...... they probably wont seat with your fingers?? If that's the case, and it's a hunting gun that might get a little dirty between cleanings, I'd clean up (or turn down) the necks a little. Shouldn't take much, maybe .0005 to .0008 off the current neck thickness. Whatever you take off will be double by time you go full circle. After you turn necks, the tension on a loaded round will decrease unless you change bushing size in the resize die. You may have a tight enough bushing or die neck already, so this might not apply in your case. If you dont want to turn the necks, a gunsmith can sometimes ream out the chamber neck just a touch. Or, you could try a different brand of brass that has thinner necks to begin with. If you've never turned necks, you can be in for quite a little expense with expander mandrels, turning mandrels, power case drivers, case holders, neck turner and cutters, tubing or neck thickness micrometers, ect. They are all necessary to turn a high volume of cases to within tight tolerances. Sinclair International is a great place to get neck turning equipment IMO. Most of the customer service people know what they are talking about and are very helpful. Just my opinion, but most rifles that are capable, don't need neck turning for 1/2 MOA groups, 1/2 minute and even better should come easy with good rifles and decent handloads/load development. But.........If we are after sub 1/4 MOA and better all the time, that's when we take off the high spots, or get tight neck chambers and turn down brass. Good Luck:) [/QUOTE]
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Who neck turns their brass
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