L.E. Wilson Mandrel Neck Sizing Die Testing Review... It Works! 13Feb2022
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Did some actual testing using the die on some fired and resized 223 brass today! For the type of reloading I plan to do which is generally to SAAMI specs this mandrel die performed well for me. Came in at about .221" .222" neck sizing for about .002".003" neck tension which was the goal.