RE: Barrel Break In Needed?
All I do is clean it throughly and go to the range(I usually shoot 3 shot groups and let her cool between) Then home and clean her out, I do this for the rest of its life, you'll never find a uncleaned gun in my safes. If for whatever reason a gun shots better with a fouled barrel I will shot my fouling shot and then clean the outside only until the hunt is finished or weather diticates it.
About the only thing I have heard is a must with a new rifle is clean it before shooting it to remove the excessive oil they use at the factory. I have been told the best way to break in a barrel is shoot it. Keeping it relatively clean will minimize the effort to remove copper, fouling, etc when you do sit down to clean.