I recently did quite a bit of reading up on barrell break-in and you will find many different suggestions, as previously stated. The one common thing I found was to try to ensure that you remove as much copper as possible during the break-in, as it can greatly affect accuracy and is much tougher to extract after considerable shooting. Do not use a copper brush with copper remover either, as it will eat the brush up. I used a jag and patches, running 2 patches after every shot for the first 10, then ran 2 patches after every 3 shots for 15 shots, then 2 patches after every 5 shots for 20 shots and then 2 patches after a 10 shot group. I also run patches through with copper remover after shooting since then, until I get a clean or relatively clean looking patch.