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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy=seating depth or tenths of powder
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<blockquote data-quote="dsculley" data-source="post: 1113869" data-attributes="member: 77514"><p>Many hand loaders first test for the perfect powder/charge weight (a course adjustment when done this way) and then fine tune with seating depth. There are those that state this is the wrong method. They say you should pick a beginning test charge, then use this to test for the best seating depth before working on a charge weight. In this method, the seating depth is the course adjustment and the powder charge weight is the fine adjustment. The longer I load, the more I defer to this method. If you test for/select a charge weight first, you are changing the case volume/pressure when you change the seating depth. If you are on a wide node, then you probably won't see a measurable change. If you are one who likes maximum charges then the increase in pressure from seating deeper could be an issue.</p><p></p><p>Of course, as was stated in an earlier post, some bullets/guns are more sensitive to seating depth than others. A wider node will be less sensitive to changes in pressure from seating depth changes, but those changes will put you either higher or lower in that node due to the pressure changes. If I first determine my seating depth, then find my OCW node I will be in the center of the node and less likely to be affected by temperature changes.</p><p></p><p>So, to answer the original question, they are both important. If the bullet is sensitive to seating depth, that becomes the most important. If the bullet is not sensitive to seating depth and the node you are loading in is narrow, the charge weight becomes the most important.</p><p></p><p>FWIW, my 2¢</p><p></p><p>Dennis</p></blockquote><p></p>
[QUOTE="dsculley, post: 1113869, member: 77514"] Many hand loaders first test for the perfect powder/charge weight (a course adjustment when done this way) and then fine tune with seating depth. There are those that state this is the wrong method. They say you should pick a beginning test charge, then use this to test for the best seating depth before working on a charge weight. In this method, the seating depth is the course adjustment and the powder charge weight is the fine adjustment. The longer I load, the more I defer to this method. If you test for/select a charge weight first, you are changing the case volume/pressure when you change the seating depth. If you are on a wide node, then you probably won't see a measurable change. If you are one who likes maximum charges then the increase in pressure from seating deeper could be an issue. Of course, as was stated in an earlier post, some bullets/guns are more sensitive to seating depth than others. A wider node will be less sensitive to changes in pressure from seating depth changes, but those changes will put you either higher or lower in that node due to the pressure changes. If I first determine my seating depth, then find my OCW node I will be in the center of the node and less likely to be affected by temperature changes. So, to answer the original question, they are both important. If the bullet is sensitive to seating depth, that becomes the most important. If the bullet is not sensitive to seating depth and the node you are loading in is narrow, the charge weight becomes the most important. FWIW, my 2¢ Dennis [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Accuracy=seating depth or tenths of powder
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