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Hunting
Long Range Hunting & Shooting
Improving the 308 Win performance
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<blockquote data-quote="nralifer" data-source="post: 2739741" data-attributes="member: 94556"><p>What is the longest COAL you could use snd still feed from your magazine? I would go for a chamber that allowed a free bore that would allow a clearance of about 0.0004"/side and is about 0.150" long depending on the allowable COAL of your magazine, the shorter the allowable COAL the shorter the free bore. The principle here is tight clearance of the bullet through the free bore maintains good alignment with the rifling and less dependence on a short jump to be sure the bullet engages the rifling straight. Barrel brands such as Douglas, Bartlein, Benchmark, McGowan and Preferred shoot our bullets well. Clean burning powder is a must.</p></blockquote><p></p>
[QUOTE="nralifer, post: 2739741, member: 94556"] What is the longest COAL you could use snd still feed from your magazine? I would go for a chamber that allowed a free bore that would allow a clearance of about 0.0004”/side and is about 0.150” long depending on the allowable COAL of your magazine, the shorter the allowable COAL the shorter the free bore. The principle here is tight clearance of the bullet through the free bore maintains good alignment with the rifling and less dependence on a short jump to be sure the bullet engages the rifling straight. Barrel brands such as Douglas, Bartlein, Benchmark, McGowan and Preferred shoot our bullets well. Clean burning powder is a must. [/QUOTE]
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Improving the 308 Win performance
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