Ordered the .306 & .3065 mandrels with the X die body for my 308 match loads I plan to make. I'm looking at .002 and .0015 interference fit. (Neck tension) I'm humming at .003 from my Redding FL die expander button. Works fine for semi-auto, but a single feed bolt gun FTR class rifle I think I want the stated neck tension. How accurate are these mandrels and any advice for lubing?
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