Here's what most of the guys at my club do for PPC loads.
Either PD HBWC or Zero DEWC over 2.3gr B.E. or 2.4gr Titegroup.

I used to use the Titegroup load until I tried the Bullseye load. The BE groups were quite a bit better. I also found 2.8gr and 3.4gr of Unique to be nearly as good as the 2.3gr BE, with 3.0 and 3.2 Unique just a bit behind the 2.8gr load.
How’s that for confusing.
The veteran PPC shooters at my club (consistently in the 596-599 scores) use the 2.3gr BE load as well. Me, I’ve been shooting PPC for 4.5 months, I am just getting into the 588-590 range for "Combat" and 565-574 range for "Service"
Shot today as a matter of fact in Fenton, Mich. 565 service and 585 24X Combat. My best score to date (during practice of course) is 590 32X, followed by 3 588's in a row.