ORIGINAL: ShatoDavis
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!
There is a way to scientificaly settle this argument. It is hard to know how a given rifle would shoot if someone had been doing something different. The only way to solve the problem is to do a double blind test. Take to sets of random rifles for a given make / manufacturer, do the break in on one set and nothing on the other set. After few hundred rounds see how they shoot and compute the statistics.
If someone or a manufactuer want to sponsor me, I would be happy to do the math and some shooting as well