I went out to the range and shot my Bushmaster Varminter for the first time. I followed the general prescription for the barrel break-in, as stated in the manual.

However, when I went to clean the barrel there was no copper fouling, and I mean none! (I was using Sweet's 7.62). I guess I thought there would be a lot of copper residue in a new barrel, especially in the first few shots. After about 20 rounds, further break-in didn't seem necessary. Either it was a very smooth barrel out of the box or I was doing something incorrectly.

Any ideas?

Sounds like you got a good barrel.

Take care of it and enjoy!