I recently bought a new Kimber Montana in 300WSM and here is my question. For years I owned many rifles that never had any kind of proper barrell break in done to them and they performed flawlessly for many years with great accuracy, simply because I was unaware that this(barrell breakins) was done. I have in the last few years done proper barrel break ins on a couple guns. I have talked to many gunsmiths about this and what I have been told in whole is that the only reason to do a true 1 shot clean and so on barrell break in is simply to condition the barrell for long term cleaning. That it has nothing to do with accuracy or anything else.Can someone give me some insight and even their opinions on whether this is truly neccessary or just a precarious myth.