I have the same barrel (WOA 20 inch)with 125 rounds down the tube. 26 grains of ARcomp, 40 gr Berger seated @ 2.24. This load shot 3 that I could cover with a dime for three groups. I threw it together for a hunting load the other night using quickload, it looked good so I decided to try it and was pleasantly surprised. I shot the group at 100 with my thermal scope. I am gonna start doing some more load development once I get past the 200 round mark. I will shoot it with a traditional scope and see what transpires and see if I need to tweak it. Sorry in advance if there are typos, I just got my eyes dilated and cant see really good right now, lol.