So I have been cleaning my, new to me......340 Weatherby Mag Alaskan. It has a nickel coated stainless bbl. Anyways I disassembled the gun to clean it. The bolt and inside the stock everything was very very clean. I don't think the gun was ever hunted. The problem is, I have been working on the inside of the barrel for 6 hours now. I have ran a good 40+ patches and scrubbed the barrel with a brush 3 times. I have been using Shooters Choice patches, and then 2 patches of Sweets 7.62(or whatever the number) then coat the brush with Sweets. I then scrub for 10 strokes, then let the gun sit for 20-30 minutes. Then run more and more patches of Shooter's choice. The patches are still coming out blue. dark blue after scrubbing and then lighten up but never going clean. So When I bought this gun I had the place scope the gun (supposedly) and they said the barrel looked great. I bought the gun sight unseen other than pictures. Like I said the gun is in fantastic shape but I am beginning to wonder if I made a mistake. I am wondering of the guy who owned the gun before me lost accuracy so he traded it. I am thinking the barrel could have been fouled because no way did someone that knows guns let this barrel get this bad. When do I know when to stop cleaning? Is the stainless barrel having something to do with it? I have never had a stainless gun before so I don't know what to expect.