@couscous not exactly. This is chapter 22 in volume sorting, but in magazine sorting, it's chapter 36 and 37 together. You can check it through the Chinese chapters (chapter 36: https://mangadex.org/chapter/662486, chapter 37: https://mangadex.org/chapter/664353). So, it's way less than 50+ chapters, it's around 30.
Can confirm the gun one from personal, family experience. Older relative attempted suicide by shotgun, put the gun under his chin angled upwards; to all intensive purposes the trajectory for the shot should have completely emptied his skull but it didn't, he survived and was disfigured for the rest of his life even after numerous reconstructive surgeries.
Guns are much less effective than people think. Gonna stop myself here before I go off on a tangent about military stuff.