Barrel Break-In (or how to shorten a barrel's useful life)

[explorecaves]

Ok a couple questions. I had a benchrest guy tell me that if you leave carbon build up in your barrel that it would attract moisture and create a corrosion issue. First is there any truth to this and if it is true should i be running a patch with oil through the barrel after i shoot. lastly what is the best method to remove copper while leaving carbon

This should answer your question regarding corrosive ammo use. http://blog.cheaperthandirt.com/corrosive-ammunition/