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Rifles, Reloading, Optics, Equipment
Reloading
Loading to magazine length/bent tips
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<blockquote data-quote="CONatureBoy" data-source="post: 2215750" data-attributes="member: 118769"><p>I agree with the reasoning about what long freebore does. But 'freebore' is synonymous with 'throat' (<a href="https://en.wikipedia.org/wiki/Freebore" target="_blank">https://en.wikipedia.org/wiki/Freebore</a>), which ends where the rifling starts (the back of the leade). If I'm reading the SAAMI-standard 300 RUM chamber specification right (see my post above), the RUM only has about 0.12" of freebore. That's nothing like the half inch or so in some Weatherbys. It is true that serious shooters will sometimes have custom reamers built, or have gunsmiths use non-standard reamers, to get longer throats (both to seat longer bullets and to enjoy the pressure effect you describe). But unless I'm reading the SAAMI spec wrong, 300 RUMs don't have lots of freebore. Am I reading the diagram wrong?</p></blockquote><p></p>
[QUOTE="CONatureBoy, post: 2215750, member: 118769"] I agree with the reasoning about what long freebore does. But 'freebore' is synonymous with 'throat' ([URL]https://en.wikipedia.org/wiki/Freebore[/URL]), which ends where the rifling starts (the back of the leade). If I'm reading the SAAMI-standard 300 RUM chamber specification right (see my post above), the RUM only has about 0.12" of freebore. That's nothing like the half inch or so in some Weatherbys. It is true that serious shooters will sometimes have custom reamers built, or have gunsmiths use non-standard reamers, to get longer throats (both to seat longer bullets and to enjoy the pressure effect you describe). But unless I'm reading the SAAMI spec wrong, 300 RUMs don't have lots of freebore. Am I reading the diagram wrong? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Loading to magazine length/bent tips
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