I tried TAC with 400 grain Woodies in my .405 WCF; my final load of a 5 shot string had zero ( 0 ) fps average deviation. Also accurate with 5 off hand shots into 10 inch ring at 50 yards. I quit there and went to RSA and shot this Cape Buff:
[Linked Image from jpgbox.com]

Chamber pressure topped out at 49,000 psi, a bit above recommended peak pressure for the 1895 .405.

I have since switched to VV N133 because of much (12,000 psi) lower peak chamber pressures (smooth curve, NO spikes).

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