I am in the .357 brass in .357 crowd. But, I don't have any range restrictions to deal with either.
In the old days shooting tank cannons the accumulators would get clogged with carbon. Military bore cleaner would not cut it. Brake cleaner worked ok but was horrible to work with. We used wire wheels to work on it and it still seemed to take forever. Then Break Free CLP became available. Stuff was like magic. Swab it in there. Swab out the loose stuff. Swab and let sit for an hour and wipe free. If we could we'd let them sit for another day and then swab out and they would be as clean as could be. The only problem was it came in 55gal drums and had to be stirred before use. Amazing to watch troops come up with ways to mix up stuff in a drum
Problem now days is I only see it in the expensive spray cans. I have migrated to Ed's Red (modified) these days. ATF, Kerosene and Acetone or MEK. It seems to work on just about anything. Also works best after soaking for 10 min or so.