I`ve bounced between 5.2gr of TiteGroup and 7.8gr of PowerPistol over Fed 205 primers @ 1.215" OAL in my Kimber full size. My use of this bullet has been limited though and I can`t say one load was notably any better then the other.
I`d start with the starting load in what ever manual you have for this bullet weight with the powder you have on hand and work it up. The acp is pretty easy to feed in my experience and usually shoots well with most suitable powders
