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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Help On Understanding Neck Dimensions?
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<blockquote data-quote="Varmint Hunter" data-source="post: 36113" data-attributes="member: 313"><p>No matter how you resize your cases the finished round will have the same neck diameter. This measurement is simply the neck wall thickness x2 plus the bullet diameter (.284").</p><p></p><p>It looks like you have chosen the correct bushing, which is generally .002"-.003" less than the loaded round neck diameter.</p><p></p><p>As you can see, your chamber will allow aprox .010" of neck expansion necessatating about .012" of resizing for reloading. This can shorten brass life a bit. A tight neck or minimum spec chamber reduces this problem.</p><p></p><p>All your figures seem ok except that I'm surprised to hear that a .314 bushing could result in a case neck diameter of .312". If anything, brass spring back would result in a diameter of 1 or 2 thousandths larger than the .314" bushing.</p><p></p><p>Have fun - It sounds like you've caught the bug. <img src="http://images/icons/wink.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>VH</p></blockquote><p></p>
[QUOTE="Varmint Hunter, post: 36113, member: 313"] No matter how you resize your cases the finished round will have the same neck diameter. This measurement is simply the neck wall thickness x2 plus the bullet diameter (.284"). It looks like you have chosen the correct bushing, which is generally .002"-.003" less than the loaded round neck diameter. As you can see, your chamber will allow aprox .010" of neck expansion necessatating about .012" of resizing for reloading. This can shorten brass life a bit. A tight neck or minimum spec chamber reduces this problem. All your figures seem ok except that I'm surprised to hear that a .314 bushing could result in a case neck diameter of .312". If anything, brass spring back would result in a diameter of 1 or 2 thousandths larger than the .314" bushing. Have fun - It sounds like you've caught the bug. [img]images/icons/wink.gif[/img] VH [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Help On Understanding Neck Dimensions?
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