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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300WM freebore
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<blockquote data-quote="MagnumManiac" data-source="post: 3039659" data-attributes="member: 10755"><p>Take the longest bullet you intend to use, make a dummy round with the heal of the bullet below the neck/shoulder juncture and measure. You may find you have to compromise on that measurement due to it not fitting your mag but works across several boattail bullets.</p><p>This is is how I have always measured my throat, sometimes it works exactly for the intended bullet, like running 142g or 150g pills in the 264WM with a 3.7" mag, or sometimes, like the 7STW or 6.5-300 Weatherby, it doesn't and you cut the difference…</p><p>The 300WM requires at least .220" throat for a 210g VLD bullet, my A191 chambers are cut .240" for 215's & 230's, neither bullet is exactly at that point though.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 3039659, member: 10755"] Take the longest bullet you intend to use, make a dummy round with the heal of the bullet below the neck/shoulder juncture and measure. You may find you have to compromise on that measurement due to it not fitting your mag but works across several boattail bullets. This is is how I have always measured my throat, sometimes it works exactly for the intended bullet, like running 142g or 150g pills in the 264WM with a 3.7" mag, or sometimes, like the 7STW or 6.5-300 Weatherby, it doesn't and you cut the difference… The 300WM requires at least .220” throat for a 210g VLD bullet, my A191 chambers are cut .240” for 215’s & 230’s, neither bullet is exactly at that point though. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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300WM freebore
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