StealthyBlagga Posted January 3, 2012 Share Posted January 3, 2012 (edited) I am sizing .223 brass and seem to be getting more length-to-shoulder sizing variation than I think I should. Using an RCBS micrometer case gage, I am seeing an extreme spread of 0.005", which seems excessive to me. Here is my setup: XL-650 press Station 1: Lee Universal Decap die Station 2: EMPTY Station 3: Dillon FL size die with RT-1200 trimmer Station 4: EMPTY Station 5: RCBS Neck Size die The shell plate is set as tight as possible while still turning smoothly. I am lubing the brass (once fired LC) with Dillon case lube, and making sure the lube gets inside the neck. The Dillon size die is set low enough that the handle is camming over, so I presume there is little slack in the system. Lastly, I am doing my best to hold the handle in the down position consistently. I am shooting for 0.003" under chamber length, and am seeing a range of 0.001" to 0.006" under chamber length. Am I being too picky, or should I expect better? Should I consider doing full-length sizing in Station 1 and back off the trimmer sizing die? I am also considering the needle bearing modification - might this help? Whatever suggestions you guys have would be gratefully received - I am hoping to get my reloads dialed in before SMM3G Edited January 3, 2012 by StealthyBlagga Quote Link to comment Share on other sites More sharing options...
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