Try a search on barrel break in
There used to be info in our tech section but I don't think it has been restored yet. Google - "barrel break in" and you can read for weeks.
I think the main thing is to get a good bore guide and a 1 piece coated rod before you start. I did 1 shot and clean for a few rounds, 3 shots and clean for a few more. Use a good solvent like Butch's and you'll be in fine shape.
I'd put it on paper while breaking it in and shoot whatever loads you plan on using.
I am no expert and I'm sure others will chime in if I am off base.
Have fun,
Dave