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Rifles, Reloading, Optics, Equipment
Gunsmithing
300RUM build with 210VLD COAL?
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<blockquote data-quote="NesikaChad" data-source="post: 365376" data-attributes="member: 7449"><p>When building a rifle with the intention of ignoring the idea of it being functional/practical I let the bullet determine the seating depth and the chamber's throat/freebore-meaning I follow a simple process.</p><p></p><p>Most have heard about the dreaded "doughnut" located at the neck/shoulder junction. This is reported to cause potential deviations in velocity due to inconsistent neck tension/release tension. The simple solution is to avoid it. Seat the bearing surface/boat tail junction just above the neck/shoulder junction and then throat the barrel accordingly. This will give you the case volume to get the load density you want. </p><p></p><p>From there just bump your seating depths in either direction until the rifle settles down and starts plotting shots the way you want it. I'd advise having the reamer made based off the cartridge length, but it could be throated with a ream after being chambered also.</p><p></p><p>Good luck.</p><p></p><p>-C</p></blockquote><p></p>
[QUOTE="NesikaChad, post: 365376, member: 7449"] When building a rifle with the intention of ignoring the idea of it being functional/practical I let the bullet determine the seating depth and the chamber's throat/freebore-meaning I follow a simple process. Most have heard about the dreaded "doughnut" located at the neck/shoulder junction. This is reported to cause potential deviations in velocity due to inconsistent neck tension/release tension. The simple solution is to avoid it. Seat the bearing surface/boat tail junction just above the neck/shoulder junction and then throat the barrel accordingly. This will give you the case volume to get the load density you want. From there just bump your seating depths in either direction until the rifle settles down and starts plotting shots the way you want it. I'd advise having the reamer made based off the cartridge length, but it could be throated with a ream after being chambered also. Good luck. -C [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
300RUM build with 210VLD COAL?
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