I have no time. It gets more elusive all the time. I’ve broken in barrels with the clean, shoot, clean, shoot, blah blah blah. The last 15 years I just shoot a bunch and then clean every so often. My latest barrel is a 6.5 1-8 Benchmark. I shot 20 rounds through it, cleaned it and then shot 80 more. Last night I ran three patches soaked with whipeout patch out and let it sit for 90 minutes. Then I pushed this patch through.
Break them in if you wish. I sure don’t.