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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
284 Win reamer
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<blockquote data-quote="DavidA" data-source="post: 2214149" data-attributes="member: 72334"><p>I custom throated my 284 win McGowen Precision 28" -8 barrel. My 180 VLD's at 15 thousandth off the lands has a COAL of 3.269 This was done optimizing bore for 180 to 197's. So in the end it is close to a .220 freebore. If I place 197 SMK's 15 thousandths of lands their COAL is 3.393. My virgin Peterson Brass measures .015 neck thickness with .312 od. </p><p>Not sure where that would put a 168 off the lands if you place the bearing surface to the end of the neck. A quick guess is you are probably 70 or 80 thousandths back. hard to say some bullets like a lot of jump in certain rifles. In the end though as you push out the throat you are committing yourself to long long bullets. So maybe you go .200 or .188. Give you a broader bandwidth of bullets.</p></blockquote><p></p>
[QUOTE="DavidA, post: 2214149, member: 72334"] I custom throated my 284 win McGowen Precision 28” -8 barrel. My 180 VLD’s at 15 thousandth off the lands has a COAL of 3.269 This was done optimizing bore for 180 to 197’s. So in the end it is close to a .220 freebore. If I place 197 SMK’s 15 thousandths of lands their COAL is 3.393. My virgin Peterson Brass measures .015 neck thickness with .312 od. Not sure where that would put a 168 off the lands if you place the bearing surface to the end of the neck. A quick guess is you are probably 70 or 80 thousandths back. hard to say some bullets like a lot of jump in certain rifles. In the end though as you push out the throat you are committing yourself to long long bullets. So maybe you go .200 or .188. Give you a broader bandwidth of bullets. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
284 Win reamer
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