T-shooter yup that explains it thanks, ive F^**(D it up. Mine is not parallel I have removed far more from the right side then the left side so mine is sloping downwards. Only I could stuff that up sanding on a glass table doing figure of 8 lol. anyway I will see how I can best get it parallel[ and also turn the shell holder in my finger/QUOTE]
Your figure 8 movement is a good thing. when I reduce the height of a S/H I do the figure 8 and also turn the shell holder in my fingers by 90 degrees every 10 to 15 full figure eight strokes using 400 grit wet or dry. See if this helps. check your progress by actually sizing a case to see if you are reducing the "bump" measurement......... Once in a similar situation I ordered several shell holders from different MFG's. To my surprise the Lee shell holder was far and away more accurately machined (squarest) and most accurate in the .125" dimension.
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