jeremydallen
Inactive
I have a Mossberg 835 pump that I bought when I was 18. Unfortunately, I didn't always clean it like I should when I was younger. There is quite a bit of hardened, residual build up in the barrel. I've used the gun/bore scrubber sprays, let it sit in there for quite some time but it seems to be pretty adhered to the barrel. Any thoughts on removing the build up? It's literally had years to solidify in there.