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<p>[QUOTE=&quot;cpm9ball, post: 1910294, member: 24633&quot;]It occurs when the collar is not raised fully surrounding the planchet, and the metal is squeezed beyond the collar when it is struck. The technical term for this is a &quot;Flanged Partial Collar Strike&quot;, but it got the nickname &quot;Railroad Rim&quot; even though it is actually the edge that is affected rather than the rim.</p><p><br /></p><p>Chris[/QUOTE]</p><p><br /></p>

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