I have a Rem 700 BDL SS in 270 that is 14 years old. For the majority of those years i have shot Win ballistic silvertips. The last few years i have seen the accuracy drop off very bad. I'm wondering how much the black lubalox coating has affected my barrel and whats the best way to clean it. I have been using Gunslick foaming bore cleaner and have repeated this many times, along with a wire brush, but I just cant seem to get it clean. My goal is to get the bore good and clean and try some differient ammo (suggestion welcome).