How do I clean this thing???

[Landy67]

Hi all,

I have a VH Vulcan barred F/Fuller 12G. When I bought it, the bores were like mirrors. I've run a few hundred rounds through it, and the last hundred or so rounds were loaded with fiber wads. There is a crazy amount of lead fouling.

I swabbed it with Hoppe's #9, let it soak, and brushed it with my favorite old brush, but the barrel looks awful. I re-swabbed and let the Hoppe's soak for a while, then put a new bronze brush on the cleaning rod, and used a cordless drill to spin it around for a bit, then cleaned with a Bore Tech cleaning Jag and a cotton patch. Bore Tech

When that didn't work, I shot some Bright Bore down the tubes, let it sit for a while, did the brush and jag again, but I can still see the lead.

Any recomendation on what to use to "get the lead out?"

Thanks