I personally don't go through any formal break in process, but I do clean my barrel pretty frequently - even while on the range. I'd say no more than every 5 rounds and I'll stop and clean. My thinking is that I hunt with a clean, cold, barrel, so I target practice the same way.

The only exception is if I have extra loaded rounds that I've determined won't be used going forward. In that case, I usually fire them all to clean out the brass and be ready for my next loading session.