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Rifles, Reloading, Optics, Equipment
Reloading
Pressure changes with seating depth
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<blockquote data-quote="JASmith" data-source="post: 1752591" data-attributes="member: 24844"><p>I did the exercise using Pressure Trace on a TC Encore chambered for the 6.5 Grendel.</p><p></p><p>The results were largely consistent with the QuickLoad manual admonition to boost the starting pressure by about 5,000 psi when the bullet is in the lands.</p><p></p><p>So, there was a gradual decrease in pressure as the COL was increased followed by a jump in pressure when the bullet was touching or jammed in the lands.</p><p></p><p>The rate of decrease and added pressure were not, however, as significant as I would have expected from the QL calculations. That may have been a result of the compund 1.5 - 0.5 degree throat in a SAAMI-spec Grendel chamber.</p></blockquote><p></p>
[QUOTE="JASmith, post: 1752591, member: 24844"] I did the exercise using Pressure Trace on a TC Encore chambered for the 6.5 Grendel. The results were largely consistent with the QuickLoad manual admonition to boost the starting pressure by about 5,000 psi when the bullet is in the lands. So, there was a gradual decrease in pressure as the COL was increased followed by a jump in pressure when the bullet was touching or jammed in the lands. The rate of decrease and added pressure were not, however, as significant as I would have expected from the QL calculations. That may have been a result of the compund 1.5 - 0.5 degree throat in a SAAMI-spec Grendel chamber. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Pressure changes with seating depth
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