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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Throat testing
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<blockquote data-quote="nksmfamjp" data-source="post: 2011937" data-attributes="member: 1951"><p>I'm interested if anybody has done any testing of throat parameters vs accuracy.</p><p></p><p>The key parameters to me seem like: </p><p>Diameter - At bullet diameter, I suppose there may be some pressure potential, but I think some folks are using 0,001" over bullet diameter. Up to 0.005" over bullet diameter. Results?</p><p></p><p>Freebore length - Maybe SAAMI is the minimum, but has testing been done with 0.1-0.5" of free bore?</p><p></p><p>Throat Angle - I think 1 deg 30 min is std, but have folks tried 30 min through let's say 5 deg?</p><p></p><p>If I understand right, the revolutionary concept with 6.5 PRC and 300 PRC is tighter freebore.</p><p></p><p>Any thoughts or successful endeavors you have had with changes to the throat?</p></blockquote><p></p>
[QUOTE="nksmfamjp, post: 2011937, member: 1951"] I’m interested if anybody has done any testing of throat parameters vs accuracy. The key parameters to me seem like: Diameter - At bullet diameter, I suppose there may be some pressure potential, but I think some folks are using 0,001” over bullet diameter. Up to 0.005” over bullet diameter. Results? Freebore length - Maybe SAAMI is the minimum, but has testing been done with 0.1-0.5” of free bore? Throat Angle - I think 1 deg 30 min is std, but have folks tried 30 min through let’s say 5 deg? If I understand right, the revolutionary concept with 6.5 PRC and 300 PRC is tighter freebore. Any thoughts or successful endeavors you have had with changes to the throat? [/QUOTE]
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Throat testing
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