Thread: Playing with some Redding Competition Shell Holders

Scuse my ignorance but how the hell do you reliably measure to 1 thou repeatedly? I can take 10 measurements with either digital or dial calipers and luckybto get the same reading sequentially. Yes I know I dont have $500 calipers but the variation seems to be more in the way/pressure with which I take the measurement than that capability of the tool itself. The slightest difference in hand pressure, motion etc gives a different reading.