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Hunting
Long Range Hunting & Shooting
Is the 7PRC really promoted as a long range caliber?
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<blockquote data-quote="Carey Farmer" data-source="post: 2992804" data-attributes="member: 122715"><p>Not too hard to model this with the right software. Velocity lost from cutting down barrel length is proportional to barrel pressure at the time that the bullet clears the muzzle.</p><p></p><p>Big cases and heavy charges of slow powder will sustain high pressure as the bullet travels down the barrel, so that's where you'll see big gains from long barrels.</p><p></p><p>For a woods rifle chambered in .308 Winchester and loaded with Varget, a 20 inch barrel is plenty. For a long range .264 Win Mag or 28 Nosler with Retumbo, a 30 inch barrel works great.</p></blockquote><p></p>
[QUOTE="Carey Farmer, post: 2992804, member: 122715"] Not too hard to model this with the right software. Velocity lost from cutting down barrel length is proportional to barrel pressure at the time that the bullet clears the muzzle. Big cases and heavy charges of slow powder will sustain high pressure as the bullet travels down the barrel, so that's where you'll see big gains from long barrels. For a woods rifle chambered in .308 Winchester and loaded with Varget, a 20 inch barrel is plenty. For a long range .264 Win Mag or 28 Nosler with Retumbo, a 30 inch barrel works great. [/QUOTE]
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Is the 7PRC really promoted as a long range caliber?
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