I have this bug that occurs when firing the Carbon Hunter. When zoomed in, and loading in a new cartridge, if you zoom out as the reload animation plays, it will not complete the process to load a new cartridge. When you pull the trigger, you can see the tip of the barrel pop up, as if something was fired, but instead the reload animation will start up. If you unzoom while this is happening, it will stop the reload and cause a no fire scenario again. This only happens when going from zoomed in with a scope, to zoomed out. If you remove the scope, you will have no issue whatsoever reloading, even if you are in focus mode.