Hi, I'm a mechanical engineer intending to do my thesis on some aspect of gunsmithing (I work for a small defense firm so I have some resources at my disposal to do this). The problem is that getting extensive resources, namely books, on INDIVIDUAL topics is difficult to find. I am leaning towards doing a topic on harmonic distortion of barrels, and how to to improve accuracy by mitigating this effect. However, I can't seem to find more than a few paragraphs at a time. Does anyone know of any books that are quite scientific and extensive enough for what I'm attempting? In addition, it would be awesome to hear if people like you who are more experienced than me at this point have any good ideas for a possible topic. But my main intention is to obtain resources. Any help would be appreciated.