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Rifles, Reloading, Optics, Equipment
Reloading
For any one who has "bedded" their seating stem...
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<blockquote data-quote="toliver" data-source="post: 1200148" data-attributes="member: 74698"><p>I've been following this and I'm confused. So i'll ask the question so I can hopefully learn something. OP is seeing a difference in CBTO measurements between loads. Is seeing a ring around the the bullet from the seating die. I think most of the time if I look close enough I see some evidence of a ring on the bullet. There have been a lot of good suggestions on how to sort it out. One was to sort the bullets etc. fine to do anyway if looking for consistency. The troubling part is that it is varying so much. So I am looking at it from the press point of view. The die is set at a fixed position, The ram comes up to what should be a positive stop. In other words the distance between the ram and seater should remain a constant or very close. If bullets are sorted or not the ogive to base should not vary much if the stem is pushing on the same diameter surface of every bullet.</p><p>Even if the bullet was a bit longer the extra would go deeper into the case and the measurement should be the same? Or is it possible that pressing down hard on the ram could induce a slightly shorter CBTO and less pressure could make a longer one. Is it even possible to force on the ram enough to see a differance? I'm using fairly used gear and dont see more than .001 variance. Something seems out of whack? Could the caliper be out. I'm just fishing because it's a good learning point, and would like to know what fixes it.</p></blockquote><p></p>
[QUOTE="toliver, post: 1200148, member: 74698"] I've been following this and I'm confused. So i'll ask the question so I can hopefully learn something. OP is seeing a difference in CBTO measurements between loads. Is seeing a ring around the the bullet from the seating die. I think most of the time if I look close enough I see some evidence of a ring on the bullet. There have been a lot of good suggestions on how to sort it out. One was to sort the bullets etc. fine to do anyway if looking for consistency. The troubling part is that it is varying so much. So I am looking at it from the press point of view. The die is set at a fixed position, The ram comes up to what should be a positive stop. In other words the distance between the ram and seater should remain a constant or very close. If bullets are sorted or not the ogive to base should not vary much if the stem is pushing on the same diameter surface of every bullet. Even if the bullet was a bit longer the extra would go deeper into the case and the measurement should be the same? Or is it possible that pressing down hard on the ram could induce a slightly shorter CBTO and less pressure could make a longer one. Is it even possible to force on the ram enough to see a differance? I'm using fairly used gear and dont see more than .001 variance. Something seems out of whack? Could the caliper be out. I'm just fishing because it's a good learning point, and would like to know what fixes it. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
For any one who has "bedded" their seating stem...
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