Break in

[D.ID]

Obviously opinions vary..........mine:
CLEAN IT FIRST.
Shoot once, strip copper with a copper solvent.
Shoot three, strip carbon with regular solvent and copper with a copper solvent.
Done.

[barrel-nut]

....

[D.ID]

I would recommend anyone asking this question to take a look at Rex's opinion on u-tube's sniper 101 series. He does a good job of explaining two opposing schools of thought and the reasoning behind them.

[GaCop]

Initial cleaning, shoot it and have fun. Clean again when accuracy falls off.

+1, the way to go.