Ran some of the 147gn clean fire through a couple different guns, it was perfectly reliable and accurate. I can't really say if it's cleaner than other ammo without doing some kind of direct comparison.
This isn't relevant to your query, but I recently reloaded five boxes of 9mm Makarov, mostly "Red Army" brass. I don't know what primers they use, but there was virtually no trace of residue in the primer pockets; cleanest I've ever come across. There was marginal powder residue inside of the case.