I have reloaded for my 9mm CZ for many years. My question is: Is the COL really, really that important? I do the "plunk test" & try my best to keep COL exactly the same for each round, however I do get variations from round to round....vary approx 2/1000s to 5/1000s in COL. I have never had any problems, no misfires, no high pressure signs. I have read that with the 9mm cartridge COL is critical & even small differences in length can cause problems, should I be concerned about my loads? My usual loading is 4.3 to 4.7 grs of Titegroup under an Everglades 115 gr JHP, my COL is 1.095 + or - as stated above........so what do you guys think??