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<p>[QUOTE="Conder101, post: 2107144, member: 66"]There is a fourth reason as well. The dies have a flat ground on the side of the die for the set screw to press against. (Easier to firmly lock down the die pressing against a flat area than against the round die body.) This flat area is ground onto the die by pressing the die by hand against the grinder. If the die isn't held right the flat is ground in the wrong place on the die body. It isn't hard to have this flat off slightly. Say the flat is supposed to be ground at 12:00 and you grind it 5 mm off of that position (less than a quarter inch off). When the die is placed in the press with the flat in the correct position for the set screw, the die face will be rotated 15 degrees off from where it should be. Grind the flat at the 1:00 position and it will be 30 degrees off.</p><p><br /></p><p>This is a case where the dies aren't actually rotated, and the die was put in the press correctly, but the die was manufactured improperly.[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 2107144, member: 66"]There is a fourth reason as well. The dies have a flat ground on the side of the die for the set screw to press against. (Easier to firmly lock down the die pressing against a flat area than against the round die body.) This flat area is ground onto the die by pressing the die by hand against the grinder. If the die isn't held right the flat is ground in the wrong place on the die body. It isn't hard to have this flat off slightly. Say the flat is supposed to be ground at 12:00 and you grind it 5 mm off of that position (less than a quarter inch off). When the die is placed in the press with the flat in the correct position for the set screw, the die face will be rotated 15 degrees off from where it should be. Grind the flat at the 1:00 position and it will be 30 degrees off. This is a case where the dies aren't actually rotated, and the die was put in the press correctly, but the die was manufactured improperly.[/QUOTE]
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