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Rifles, Reloading, Optics, Equipment
Reloading
7 RUM jump vs free bore
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<blockquote data-quote="dinmax82" data-source="post: 1121818" data-attributes="member: 85447"><p>Trying to find data on the 7RUM and the information I've found is a bit confusing. </p><p></p><p>Some sites say that the cartridge is designed to use large free bore of 0.40". I'm used to jumping bullets 0.015 or so only. They say the extreme free bore prevents over pressure and adds higher velocity. Will this still be an accurate round?</p><p></p><p>I want to use the 7RUM to push the new Berger as fast as possible with available brass and chamberings. I won't shoot it everyday obviously so barrel life isn't an issu3.</p></blockquote><p></p>
[QUOTE="dinmax82, post: 1121818, member: 85447"] Trying to find data on the 7RUM and the information I've found is a bit confusing. Some sites say that the cartridge is designed to use large free bore of 0.40". I'm used to jumping bullets 0.015 or so only. They say the extreme free bore prevents over pressure and adds higher velocity. Will this still be an accurate round? I want to use the 7RUM to push the new Berger as fast as possible with available brass and chamberings. I won't shoot it everyday obviously so barrel life isn't an issu3. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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7 RUM jump vs free bore
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