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Rifles, Reloading, Optics, Equipment
Reloading
7mm RM cases not fully fireforming to chamber
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<blockquote data-quote="doverpack12" data-source="post: 1309752" data-attributes="member: 57848"><p>Regarding bumping your powder charges. Broz just had a thread going with his 30 Nosler and finally determined once he reached an accuracy node with new brass he had to back the powder charge off 1 grain in that case to maintain equal velocity and accuracy and the new brass. His summary was the new brass sucked up extra energy and dampened the pressure peak compared to once fired which basically matches the chamber already. </p><p></p><p>I would think your brass pretty much reached the chamber size and because it is new brass has better spring back than your other brass you are measuring accounting for the 0.005" difference to the shoulder (assuming a 3.12 and not the 3.21 listed above).</p></blockquote><p></p>
[QUOTE="doverpack12, post: 1309752, member: 57848"] Regarding bumping your powder charges. Broz just had a thread going with his 30 Nosler and finally determined once he reached an accuracy node with new brass he had to back the powder charge off 1 grain in that case to maintain equal velocity and accuracy and the new brass. His summary was the new brass sucked up extra energy and dampened the pressure peak compared to once fired which basically matches the chamber already. I would think your brass pretty much reached the chamber size and because it is new brass has better spring back than your other brass you are measuring accounting for the 0.005" difference to the shoulder (assuming a 3.12 and not the 3.21 listed above). [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7mm RM cases not fully fireforming to chamber
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