Hhuber50,
I bot a factory .223 barrel for my Contender last year. Now, I know that every barrel likes it's own bullet powder combo, but it took me a little over a month to finally get one that my barrel loves.
So, just an FWIW, if you can't get something working, try a Nosler 40 grain Balistic tip over 28.5 of BL-C2. From my gun you can cover a 4 shot group with a dime a 100 yards.
My longest G-hog kill this year was 325 yards, and that's only because that's the longest shot I had. If I missed one, it certainally wasn't the gun's fault. (It was my wife's fault....well, maybe not).
Anyway, good luck and I hope you get one ragged hole.
Dave.