breaking in a barrel

[HANDGUNNER]

I just purchased a Win. 94. I've heard about breaking in the barrel. Winchester has a spot on there web site about how to do it. One round, fill the barrel with copper fouling stuff, repeat ten times to seal the barrel and prevent fouling in the future. The copper cleaner I bought recommends 15 minutes to let it sit. This would be a long and boring day at the range repeating this ten times. Anyone done this before? Is it worth it?