I also agree with jack and would like to add.By doing a break in on a barrel is for slicking the barrel as well as prolonging the barrel life.In my experience doing a break-in like coyote control said does make a differance,it makes it easier to clean.I have owned many guns and i have found that breaking in helps them last longer.I get about 1000 to 2000 more rounds through them by doing a proper breaking in.I normally do the one shot then clean 6 or seven times then i do a 2 shot clean a couple times.Note: when i brush i allow the solvent to set for about 5 minutes each time so it has time to eat all the copper out of the grooves.
My proceedure
(clean it before the first shot)
shoot one,using a bore guide and a one piece rod and a proper jag i push two oil soaked patches through then i brush with solvent,I make about ten strokes(all the way forard and all the way back)= 1 stroke,then i let set for 5 minutes.After 5 minutes I push two more oil soaked patches then i push (do not reuse dirty patches) clean dry patches til i get clean. (white patches out the end)
I repeat this 6 or seven times.
Then i go to 2 shots and clean using the same cleanig method.
I do the 2 shot clean about 4 times.
You will have about 12 to 13 shots before you have one properly broke in if u use this proceedure.This is just my proceedure im not saying this is the best,just giving you the option.After i have one broke-in I clean it about every 40 rounds.Most gunsmiths will tell you to clean every 20 rounds but i say use your own judgment on that.I do agree with the over cleaning theory that is why i clean every 40 oposed to every 20.Hope this helps.Good luck and good hunting.