I used to use Outers bronze-phosphor brushes, but they did tend to wear out faster than I'd like. And if you get copper solvent on them, not only do they wear down even faster (starts to eat away at the bronze), but they also foul up your bore.

Now I'm a bit of a clean freak, and I scrub the heck out of my bores when I do a lot of shooting at the range. But I've been using Hoppes brushes and they stand up a little better in the long run.