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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Free Bore
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<blockquote data-quote="FEENIX" data-source="post: 3057487" data-attributes="member: 14204"><p>[MEDIA=youtube]kbyv_95gOdU:340[/MEDIA]</p><p></p><p>[MEDIA=youtube]f1DR9g8RUJk:1[/MEDIA]</p><p></p><p>IIWY, I'd follow [USER=10755]@MagnumManiac[/USER] (<strong><em>I how the heck are you doing, Brother? I hope you are well.</em></strong> <img class="smilie smilie--emoji" loading="lazy" alt="🙏" title="Folded hands :pray:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f64f.png" data-shortname=":pray:" />) advice on making and sending a dummy round.</p><p></p><p>Yes, it depends on the primary bullet you are going to use. For instance, in my .338 Thor (.338 Norma Magnum improved), I asked for reamer prints for the .338 NM/I from Manson and JGS as my baseline. Dave Manson built my spec reamer before he retired. If you want to be able to use longer bullets, then you make the SAAMI freebore spec longer.</p><p></p><p>[ATTACH=full]552420[/ATTACH]</p><p></p><p>Because I knew I had enough COAL for my intended purpose, I kept the freebore at SAAMI spec. As pictured above, it has a COAL of 3.7" (touching the lands) on a 3.750" CIP LM mag with a .300 Berger. As per Greg, this is the ideal configuration. The rifle was built primarily for 250/300 Berger. If I have to use any bullet longer than the 300 Berger, I would have to seat them deeper.</p><p></p><p>Good luck!</p></blockquote><p></p>
[QUOTE="FEENIX, post: 3057487, member: 14204"] [MEDIA=youtube]kbyv_95gOdU:340[/MEDIA] [MEDIA=youtube]f1DR9g8RUJk:1[/MEDIA] IIWY, I'd follow [USER=10755]@MagnumManiac[/USER] ([B][I]I how the heck are you doing, Brother? I hope you are well.[/I][/B] 🙏) advice on making and sending a dummy round. Yes, it depends on the primary bullet you are going to use. For instance, in my .338 Thor (.338 Norma Magnum improved), I asked for reamer prints for the .338 NM/I from Manson and JGS as my baseline. Dave Manson built my spec reamer before he retired. If you want to be able to use longer bullets, then you make the SAAMI freebore spec longer. [ATTACH type="full"]552420[/ATTACH] Because I knew I had enough COAL for my intended purpose, I kept the freebore at SAAMI spec. As pictured above, it has a COAL of 3.7" (touching the lands) on a 3.750" CIP LM mag with a .300 Berger. As per Greg, this is the ideal configuration. The rifle was built primarily for 250/300 Berger. If I have to use any bullet longer than the 300 Berger, I would have to seat them deeper. Good luck! [/QUOTE]
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