You don't need live fire to get this right. In fact, you shouldn't use live fire until you’ve dry-fired it extensively.
“Calling it ‘Returns Best’ isn’t hype. The lens system alone makes my Elbit tube look like a much higher-spec unit.” — TerrynUser77, AirsoftNVG forums nvg terryn returns best
Standard movement under NVG often involves jerky head snaps. When you snap your head quickly, modern auto-gating tubes have to work overtime to adjust brightness. The Terry Return utilizes smooth, deliberate "returns" to cover. This fluid motion reduces the strain on the photocathode, preserving the life of your expensive optics and keeping your battery drain consistent. You don't need live fire to get this right