I will not swear to it, but I use it all the time in my inlines. I shoot White Rifles with large conicals. I shoot brake cleaner through the barrel and after a thousand rounds, have never seen a sign of lead fouling. It is a good cleaner for hard to clean rifles, but it is hard on stocks.
There are solvents like Birchwood Casey Solvent, Montana X-treme Cowboy Solvent, and even Hoppes ... all of them will remove lead build up when scrubbed.