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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5 PRC 156 load development
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<blockquote data-quote="BrentM" data-source="post: 2173472" data-attributes="member: 61747"><p>I am not agreement with you guys on the internal ballistics side of this yet. I have not been able to prove that adding a minute amount of internal volume to the case via moving the bullet .050 further out is worth any velocity change worth taking note of. Where things become more abrupt is if you are actually compressing the charge and then you can see gains and lower pressure for sure. I don't see anyone running 60 grains or less at 2.920-3.00 coal compressing any of the popular powders. As for speed I ran a 130 berger in my 22" barrel at 3150 at .5 grains under max. Max load, slight ejector mark, showed 3200. I ran this bullet at 2.950 COAL just like all the others. Just not convinced a long or medium action is gaining anything. A 2.80" box or mag would not be ideal but many of the internal oem mags seem to run much longer than 2.80.</p></blockquote><p></p>
[QUOTE="BrentM, post: 2173472, member: 61747"] I am not agreement with you guys on the internal ballistics side of this yet. I have not been able to prove that adding a minute amount of internal volume to the case via moving the bullet .050 further out is worth any velocity change worth taking note of. Where things become more abrupt is if you are actually compressing the charge and then you can see gains and lower pressure for sure. I don't see anyone running 60 grains or less at 2.920-3.00 coal compressing any of the popular powders. As for speed I ran a 130 berger in my 22" barrel at 3150 at .5 grains under max. Max load, slight ejector mark, showed 3200. I ran this bullet at 2.950 COAL just like all the others. Just not convinced a long or medium action is gaining anything. A 2.80" box or mag would not be ideal but many of the internal oem mags seem to run much longer than 2.80. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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6.5 PRC 156 load development
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