I wrote both the gun combat related term articles before I had access to the raws, so I assumed that the more complex names were the actual terms while the simpler versions were just more dominant in player language, because everyone is too lazy to use the full names.
However, now that I do have access to the raws, I can say that both terms are written in kanji with furigana (katakana as furigana). In most cases like this, the katakana is usually the actual term, while the kanji are just there as a translation so that the Japanese could understand the meaning behind the terms.
So, the question is, should we rename both pages to the katakana variant (Bullet Line and Bullet Circle) and have the kanji for the terns in brackets next to the kata as Japanese translation, or do we keep things as is?