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Rifles, Reloading, Optics, Equipment
7mm STW
Questions regarding properly sizing belted cases
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<blockquote data-quote="TracySes23" data-source="post: 818816" data-attributes="member: 52763"><p>That sounds like a excellent idea you have.</p><p></p><p>There's one thing I've often wondered about concerning concentricity.</p><p>I wonder how precise the bore for the ram in a reloading press actually is. I also wonder how square the face of the surface on the ram is where the shell holder goes. Then I think it would be nice to know how precise shell holders actually are. One more thing that should be precise. When the reloading press is tapped 7/8-14 is this thread centered & inline with everything on the ram. All of these things could cause a problem with concentricity. Even if the errors are small, there are a lot of places where accumulated error could be significant enough to adversely affect concentricity of a loaded round. If you consider the sizing die might also have a problem of concentricity between the inside & the outside heads, you have at least 5 places that could contribute to a loaded round being less concentric than we'd like. I forgot one more thing. The nose on the bullet seating screw could also be out.</p><p>I'm amazed they come out as close as they do.</p></blockquote><p></p>
[QUOTE="TracySes23, post: 818816, member: 52763"] That sounds like a excellent idea you have. There's one thing I've often wondered about concerning concentricity. I wonder how precise the bore for the ram in a reloading press actually is. I also wonder how square the face of the surface on the ram is where the shell holder goes. Then I think it would be nice to know how precise shell holders actually are. One more thing that should be precise. When the reloading press is tapped 7/8-14 is this thread centered & inline with everything on the ram. All of these things could cause a problem with concentricity. Even if the errors are small, there are a lot of places where accumulated error could be significant enough to adversely affect concentricity of a loaded round. If you consider the sizing die might also have a problem of concentricity between the inside & the outside heads, you have at least 5 places that could contribute to a loaded round being less concentric than we'd like. I forgot one more thing. The nose on the bullet seating screw could also be out. I'm amazed they come out as close as they do. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
Questions regarding properly sizing belted cases
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