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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Tight neck chamber
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<blockquote data-quote="AZShooter" data-source="post: 1095326" data-attributes="member: 5219"><p>Mike,</p><p></p><p>I am with you for every bit of your explanation. Well stated. A few comments/questions. </p><p></p><p>Doesn't spring back vary somewhat with neck wall thickness? Do you use the mandrel setup with all your ammo? I would think on some just using the correct bushing would suffice. </p><p></p><p>The 30 BR long also had a fitted neck (mentioned earlier) but I turned off another .0005" per side so I don't depend on springback to hold the bullet instead with I with a bushing. Accuracy stayed the same with fitted or bushing sized neck. Never considered using a mandrel. Only one I have is the K and M which might be the wrong dimension, don't know. Where do you get the mandrels? How do you determine what diameter you need?</p><p></p><p>Finally how do you explain the comments:</p><p></p><p> from Jerry Turney on the 284: 0015-.002″ per side gave a cleaner release and better accuracy.</p><p></p><p> Or Accurate shooter that the 7 WSM cases need adequate neck clearance in the chamber for bullet release. Total Clearance of .003″-.004″ (both sides combined) will probably better than .0015″ or less."</p><p></p><p>Or Elkaholic aka Rich's comment: I am convinced .004"-.005" was better in my rifle........Rich </p><p></p><p></p><p>This is not to argue or an attack. I want to learn all I can. I know that so far I have not had any issues with any clearance I have tried. BUT I know that a fitted neck needs to be carefully monitored and everything must be right and clean. I also realize you can extend brass life if you don't work the necks by expanding and reducing diameters excessively. </p><p></p><p>I find this a great discussion and have only read some of it in old issues of Precision Shooting which is no longer with us. We want more, we want more.......</p><p></p><p>Ross</p></blockquote><p></p>
[QUOTE="AZShooter, post: 1095326, member: 5219"] Mike, I am with you for every bit of your explanation. Well stated. A few comments/questions. Doesn't spring back vary somewhat with neck wall thickness? Do you use the mandrel setup with all your ammo? I would think on some just using the correct bushing would suffice. The 30 BR long also had a fitted neck (mentioned earlier) but I turned off another .0005" per side so I don't depend on springback to hold the bullet instead with I with a bushing. Accuracy stayed the same with fitted or bushing sized neck. Never considered using a mandrel. Only one I have is the K and M which might be the wrong dimension, don't know. Where do you get the mandrels? How do you determine what diameter you need? Finally how do you explain the comments: from Jerry Turney on the 284: 0015-.002″ per side gave a cleaner release and better accuracy. Or Accurate shooter that the 7 WSM cases need adequate neck clearance in the chamber for bullet release. Total Clearance of .003″-.004″ (both sides combined) will probably better than .0015″ or less." Or Elkaholic aka Rich's comment: I am convinced .004"-.005" was better in my rifle........Rich This is not to argue or an attack. I want to learn all I can. I know that so far I have not had any issues with any clearance I have tried. BUT I know that a fitted neck needs to be carefully monitored and everything must be right and clean. I also realize you can extend brass life if you don't work the necks by expanding and reducing diameters excessively. I find this a great discussion and have only read some of it in old issues of Precision Shooting which is no longer with us. We want more, we want more....... Ross [/QUOTE]
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Tight neck chamber
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