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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth question!
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<blockquote data-quote="FearNoWind" data-source="post: 1016968" data-attributes="member: 50867"><p>I am not a subscriber to the "start load testing at the lands" society. There are many reasons for my position on that theory but I'll offer just one point of consideration for your review.</p><p>When the bullet is seated into the lands, the case has more capacity. If we seat into the lands until we find pressure points and THEN start adjusting seating depths, the bullet moves further into the case. Because pressure in the case is a factor of case volume/powder charge (and perhaps some neck surface tension) as the free space in the case is consumed by a deeper seated bullet atop the same powder charge, the pressure in the case increases with each change in bullet seating depth so we have to constantly reduce powder charge to accommodate for increased seating depth. That, IMO, wastes bullets and powder.</p><p>If you want to start at the lands I suppose you could accomplish the tests you're seeking by simply loading rounds into the chamber in "single shot" fashion. But, IMO, it's dangerous to start high and work down - we should be starting low and working up when reloading and excellent accuracy is possible with considerable "jump" in very many good rifles.</p></blockquote><p></p>
[QUOTE="FearNoWind, post: 1016968, member: 50867"] I am not a subscriber to the "start load testing at the lands" society. There are many reasons for my position on that theory but I'll offer just one point of consideration for your review. When the bullet is seated into the lands, the case has more capacity. If we seat into the lands until we find pressure points and THEN start adjusting seating depths, the bullet moves further into the case. Because pressure in the case is a factor of case volume/powder charge (and perhaps some neck surface tension) as the free space in the case is consumed by a deeper seated bullet atop the same powder charge, the pressure in the case increases with each change in bullet seating depth so we have to constantly reduce powder charge to accommodate for increased seating depth. That, IMO, wastes bullets and powder. If you want to start at the lands I suppose you could accomplish the tests you're seeking by simply loading rounds into the chamber in "single shot" fashion. But, IMO, it's dangerous to start high and work down - we should be starting low and working up when reloading and excellent accuracy is possible with considerable "jump" in very many good rifles. [/QUOTE]
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Reloading
Seating depth question!
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