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Rifles, Reloading, Optics, Equipment
Reloading
260 Rem Load Recipeies?
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<blockquote data-quote="rgmeddn" data-source="post: 1000124" data-attributes="member: 56465"><p>FWIW for believers in OBT,</p><p>With the data you provided and using case length of 2.025", QuickLoad predicts slight over pressure of 62K and BT of 1.091ms, velocity of 2822fps. There is a perfect OBT node at 42.5gr which results is max pressure of 58K, BT of 1.127ms, vel 2759. QL isn't perfect in these BT calculations but often times the optimal charge is within a few tenths. Others have observed this, as have I.</p><p></p><p>BT = barrel time</p><p>OBT = optimal barrel time</p></blockquote><p></p>
[QUOTE="rgmeddn, post: 1000124, member: 56465"] FWIW for believers in OBT, With the data you provided and using case length of 2.025", QuickLoad predicts slight over pressure of 62K and BT of 1.091ms, velocity of 2822fps. There is a perfect OBT node at 42.5gr which results is max pressure of 58K, BT of 1.127ms, vel 2759. QL isn't perfect in these BT calculations but often times the optimal charge is within a few tenths. Others have observed this, as have I. BT = barrel time OBT = optimal barrel time [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
260 Rem Load Recipeies?
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