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Message: <blockquote data-quote="fguffey" data-source="post: 1865709" data-attributes="member: 113511">When I size a case I start by adjusting the die. If I go by the book I adjust the die down to the shell holder and then give the die a 1/4 additional. I call that full length sizing. If I want to know if the press won or the press won I measure the gap between the bottom of the die and top of the shell holder. In the perfect world the die will make it to the shell holder when full length sizing. If there is a gap between the bottom of the shell holder and and top of the die the case did not get full length sized. It is a little tricky but when I want to know 'by how much' the case won by I measure case head protrusion from the die. Tricky part; that would be the part about removing the the die and case from the press without removing the case.F. Guffey</blockquote>