In a low light "stoppage" situation, where one cannot not visually assess the nature of the stoppage (but for the sake of argument assume a click-but-no-bang vs. a dead trigger), I would lean toward a worst case scenario. In such a case, regardless of knowing exactly what the stoppage is, I would;
- remove magazine
- cycle the slide a few times and lock back
- re-insert mag and drop the slide
In other words, I would not assume a simple failure to fire (bad round) that could be addressed by just racking the slide. Again, all of this in the context of low or no light and not using any hand held illumination to help diagnose the stoppage.
Thoughts and/or suggestions?