builder459
I got mine at Grafs but they are kinda common at gun shops. I get 2 sets. One to use with a small piece of patch (wet/polish) and the other set just for dry carbon removal. Use the smaller one first and the larger one next if you need it. Only the small one will take a tiny bit of patch on my channels. Ive also got a stiff wire Dremel bit that will clean the base of a primer pocket. It holds a patch well for polishing too. They make polishing bits but i like the bush/patch for that application.
Like i said it can be a bit tedious but its not hard.