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Rifles, Reloading, Optics, Equipment
Gunsmithing
Deliberately throating a match barrel long
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<blockquote data-quote="J E Custom" data-source="post: 756462" data-attributes="member: 2736"><p>Freebore is not a bad thing like some think If the correct chamber and head space are used.</p><p></p><p>However , there is a point that you reach of diminishing returns. you will lose accuracy at the </p><p>cost of velocity.</p><p></p><p>Freebore should be bullet diameter so the bullet stays in alignment with the lands as it engraves</p><p>before it completly leaves the case mouth never allowing the bullet to be uncontrolled.</p><p></p><p>The length of the freebore however, is a source of major controversy and will never be totally </p><p>agreed on. the one thing that can be agreed on about Freebore is that not enough can cause </p><p>pressure early (Less powder) and lots of freebore can and does increase velocity.</p><p></p><p>All of the "NEW" high pressure/velocity cartriges have generous amounts of freebore.</p><p></p><p>How much is to much is still up for debate, But allowing the bullet to be uncontrolled at starting</p><p>velocities and durring the engraving process would be to much In my opinion.</p><p></p><p>Weatherbys are known for there velocities with factory ammo and on the larger cartriges they </p><p>have any where from .300 to .750 freebore. and if you re-chamber with less freebore you will </p><p>not be able to use factory ammo in the Weatherby chambering because of pressure.</p><p></p><p>The people that design cartriges knew what they doing and were trying to get the most of there</p><p>cartrige safely and redesigning a cartrige should be intered into with great caution.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 756462, member: 2736"] Freebore is not a bad thing like some think If the correct chamber and head space are used. However , there is a point that you reach of diminishing returns. you will lose accuracy at the cost of velocity. Freebore should be bullet diameter so the bullet stays in alignment with the lands as it engraves before it completly leaves the case mouth never allowing the bullet to be uncontrolled. The length of the freebore however, is a source of major controversy and will never be totally agreed on. the one thing that can be agreed on about Freebore is that not enough can cause pressure early (Less powder) and lots of freebore can and does increase velocity. All of the "NEW" high pressure/velocity cartriges have generous amounts of freebore. How much is to much is still up for debate, But allowing the bullet to be uncontrolled at starting velocities and durring the engraving process would be to much In my opinion. Weatherbys are known for there velocities with factory ammo and on the larger cartriges they have any where from .300 to .750 freebore. and if you re-chamber with less freebore you will not be able to use factory ammo in the Weatherby chambering because of pressure. The people that design cartriges knew what they doing and were trying to get the most of there cartrige safely and redesigning a cartrige should be intered into with great caution. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Deliberately throating a match barrel long
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