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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth vs Pressure
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<blockquote data-quote="Mikecr" data-source="post: 509708" data-attributes="member: 1521"><p>+1 SBruce</p><p></p><p>Just look at a typical 5-10thou seating adjustment. Pick up calipers, set 10thou and look at the sliver of a gap there. Now imagine how many of those slivers would fit in the full length of a case, most of which is far larger in diameter.</p><p>The percentage of volume change with deeper seating is usually very very tiny.</p><p></p><p>But timing is another matter. Powder burn timing, and peak pressure are extremely sensitive to the resistance of a bullet hitting or against the lands. But this also would vary with powder type/speed. Just as the seating volume percent change would vary with case size.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 509708, member: 1521"] +1 SBruce Just look at a typical 5-10thou seating adjustment. Pick up calipers, set 10thou and look at the sliver of a gap there. Now imagine how many of those slivers would fit in the full length of a case, most of which is far larger in diameter. The percentage of volume change with deeper seating is usually very very tiny. But timing is another matter. Powder burn timing, and peak pressure are extremely sensitive to the resistance of a bullet hitting or against the lands. But this also would vary with powder type/speed. Just as the seating volume percent change would vary with case size. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth vs Pressure
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