I am surprised you didn't do the Old Break-In
I am surprised that you didn't to the old fire one clean, fire two clean, fire three clean, xxxx up to fire 10 then clean. I have done this on many of my rifles and I honestly can't tell if it made a difference. The rifles I did it to are very accurate. They probably would have been accurate even if I didn't do the break-In on the barrel. Like all of us, I am reading articles all the time and it is very hard to tell if following there advise does anything.