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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Tight barrel issues.
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<blockquote data-quote="AZShooter" data-source="post: 2567835" data-attributes="member: 5219"><p>I seriously doubt you have a tight barrel. If you want to know you could slug the barrel. </p><p></p><p>. Any number of differences in the chamber configuration can increase pressure. The most likely causes are the amount of freebore, and neck clearance for bullet release. </p><p></p><p>Do you know the dimensions of the reamer or the chamber? </p><p></p><p>Have you tried a simple test to see if a bullet will enter the neck of a fired piece of brass? If you have difficulty putting a bullet into the case mouth the neck dimension of the chamber is too small which would cause excessive pressure. If you discover this is the problem, neck turning would solve it which means you cannot shoot factory ammunition. Having enough neck clearance will also improve accuracy IF this is the issue. </p><p></p><p>Weatherby's freebore for the 257 Weatherby is .378". If your freebore is less than it could be the cause of the excessive pressure. </p><p></p><p>The best solution is to buy the components and work up a load for your rifle.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 2567835, member: 5219"] I seriously doubt you have a tight barrel. If you want to know you could slug the barrel. . Any number of differences in the chamber configuration can increase pressure. The most likely causes are the amount of freebore, and neck clearance for bullet release. Do you know the dimensions of the reamer or the chamber? Have you tried a simple test to see if a bullet will enter the neck of a fired piece of brass? If you have difficulty putting a bullet into the case mouth the neck dimension of the chamber is too small which would cause excessive pressure. If you discover this is the problem, neck turning would solve it which means you cannot shoot factory ammunition. Having enough neck clearance will also improve accuracy IF this is the issue. Weatherby's freebore for the 257 Weatherby is .378". If your freebore is less than it could be the cause of the excessive pressure. The best solution is to buy the components and work up a load for your rifle. [/QUOTE]
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Tight barrel issues.
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