If that doesn't give you the groups you want, give BL-C2 a try. About 5 years ago when I bought a Contender barrel, I was thru about a zillion powder\bullet combo's and about ready to sell the barrel when someone suggested BL-C2.
I loaded up about 10 rounds a grain or so under the max shooting Hornady 40gr. V-max. and set the OAL to the Hornady book.
I shot all 10 in one ragged hole. Now, I'm not saying your barrel will like BL-C2, or do that....but after 2 months of frustration....it sure made my day and many groundhogs were very saddened by this find!!!