[akinswi]

I recently took my Yugo M48 to the range, and I remember when I bought it 15 years ago it shot pretty well using milsurp ammo 2 to 3 inches at 100 yards.
It shot terrible this go around , so I cleaned it with alot of ammonia.

Back then I used windex and butches bore shine (Old Formula). I was new to the milsurp scene and was always told to clean clean with ammonia with corrosive ammo.

Fast Forward to 2022 Now that I have bore scope I ran it down the bore and its caked with black substance that looks like carbon.

Im hoping if I can get it off and praying its not too pitted. I didnt see rust (red) but I see copper and alot of carbon. Im hoping the ammonia I used to clean, neutralized the corrosion and its just good ole carbon build up. The best analogy I can describe the black substance is it looks like freshly made asphalt.

Now should I plug bore and soak it with Carbon Killer ? I needs to come out my Boretech Eliminatior didnt even touch it. I tried Issos bore polish nadda