At one time I used Shooter's Choice, then moved on to Butches Bore shine (which was better and faster then Shooter's Choice), now I use KG #1 for carbon, and #12 for copper. The combination works better then either Shooter's Choice or Butches Bore shine.
I started using janitorial grade ammonia and have not looked back. I follow it up with Ed's Red. Cleaning is so much faster and I only have to use patches; which I think is easier on the bore.
I know there is a lot of controversy about using janitorial ammonia for cleaning. I look at it this way; ammonia is ammonia and is harmful to the bore no matter what concentration is used if it is not completely removed after cleaning and followed up by a good rust preventative. So I don't see any more harm using a 10% concentration over a 7-8% concentration that is used in Montana Extreme and other name brand solvents.