The best lead remover I have ever seen barr nothing Is pure copper pot scrubbers.
I purchase the "pure copper" pot scrubbers, pull them apart and cut just enough scrubber to wrap around an old bore brush. You will know when you have enough copper mesh when the brush&mesh fit nice and snug when pushing down the bore. Repeat this bore scubbing 2-3times and run a clean patch through the bore. Inspect the bore. Its truly amazing how well it works!
It is imperitive that you make sure you get the "PURE COPPER" scrubbing pads. Some scrubbing pads are copper plated steel wool. You dont want that!
To make sure of your purchase, just take a small magnet with you to the store. If tbe pot scrubber doesnt attach itself to the scrubber pad, it should be "PURE COPPER".
Hope this helps you out! I use this on my .308 Cast Bullet Target Rifle.