Re: proper barrel break in
We haven't gotten to the load dialing in phase yet, but I gave my nephew a Mossberg ATR for Christmas. We did the shoot 1/clean using a good copper solvent for the first 10 shots, then did the shoot 3/clean for the next 21 shots. He was amazed at how much faster the barrel cleaned up, and how little pressure was required to get the patch thru the bore at the end. He bought 200 patches and it wasn't enough.........
Buy and use a bore guide.