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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 RUM guys
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<blockquote data-quote="benchracer" data-source="post: 967735" data-attributes="member: 22069"><p>Without accounting for measured case capacity, QL predicted approximately 100fps slower than actual velocity with your stated powder charge, so it appears to be in the ballpark.</p><p> </p><p>From what I can tell, H1000 or Retumbo will require 110.3 grains and 113.6 grains, respectively, to equal the velocity yielded with Ramshot Hunter. Those two charges are 12% and 14% compressed, respectively. It looks to me like you will run out of case capacity before either powder can offer an advantage over Hunter.</p><p> </p><p>It appears that you will get best performance from powders like Accurate Magpro, RL-22, or IMR 7828 SSC with the 270 TSX. A 5% compressed charge of any of these should gain about 50-60 fps.</p><p> </p><p>Of course, real world results trump everything else. Thank you for sharing your results. I look forward to seeing what you come up with!</p></blockquote><p></p>
[QUOTE="benchracer, post: 967735, member: 22069"] Without accounting for measured case capacity, QL predicted approximately 100fps slower than actual velocity with your stated powder charge, so it appears to be in the ballpark. From what I can tell, H1000 or Retumbo will require 110.3 grains and 113.6 grains, respectively, to equal the velocity yielded with Ramshot Hunter. Those two charges are 12% and 14% compressed, respectively. It looks to me like you will run out of case capacity before either powder can offer an advantage over Hunter. It appears that you will get best performance from powders like Accurate Magpro, RL-22, or IMR 7828 SSC with the 270 TSX. A 5% compressed charge of any of these should gain about 50-60 fps. Of course, real world results trump everything else. Thank you for sharing your results. I look forward to seeing what you come up with! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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375 RUM guys
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