I have found that TAC meters very smoothly and compresses well - also ACCURATELY. This allows very fine load adjustments.
My final load for a 400 grain Woodleigh in my .405 WCF produced the desired velocity of 2076 fps and ZERO deviation for the final five shots. This was +1, -_1 ,0 and such for average of zero.
So good that I took it to kill a cape buff with it. smile

CRS, NRA Benefactor Life Member, Whittington Center, TSRA, DWWC, DRSS
Android Reloading Ballistics App at http://www.xplat.net/