ORIGINAL: eldeguello
I've got about 20 years MORE EXPERIENCE than most "experts" alive today. This applies in particular to the ones writing in the gun rags these days.
And I have proven to my own satisfaction, with probably over 250 or so different rifles of different calibers since1952, that this break-in stuff is B.S.! Now, if you want to use up your ammo, barrels, and cleaning supplies that way, have a balland do it!
IMHO you are just plain wrong!
If you aren't willing to spend 50 rounds down a barreland do a little cleaning then don't.But I've seen enought to know that it works.
alsagar
i do not use abrasive cleaners in my gun barrels. It is really easy to get the copper fouling out with a good copper solvent if you clean the gun on a regular basis.

Copper easy to remove? I think not. It can be quite time consuming to remove properly.
This argument is pointless folks. Some people are meticulous about their rifles, some aren't. To each their own!