Two Things I Learned This Week.
As I have detailed in a previous thread, I do almost all my shooting/training in the dark now, as I feel it is much more realistic in regards to when we might encounter trouble (or at least for me personally).
I shoot between 100-200 rounds once a week, and this week I focused on malfunction drills by mixing in some dummy rounds and by setting up purposeful double feeds. I discovered that it takes more effort to recognize a malfunction or reload situation in the dark, as you are more reliant on your "feel" on how the gun is cycling, rather than your vision. Most people are used to seeing a malfunction in conjunction with perhaps feeling that FTF click, etc or seeing the slide lock back. Regardless, they tend to focus on the visual part to comprehend a problem, if they even see it at all!
When its pitch black, you can mistake a slide lock for a FTF if you haven't been paying attention to how many rounds you have let loose, or the weight of the pistol in your hand decreasing. I found myself tap racking a empty chamber several times when I was indeed empty (mags purposefully loaded not to capacity w/ random round count).
Going along with this thought, I also learned that it takes practice to do a brass check with no light. Especially if your hands are slippery. This includes recognizing a double feed, which is much easier to deal with in a lighted situation...
Muscle memory is the key to deal with malfunctions under stress, as you go from a tunnel vision, etc condition to one that requires quite a bit of manual dexterity. Your body can't do precise things under stress, it will only default to your lowest level of training. So lots of dry draws and tap racks! I do roughly 50 or so before using live rounds as a warmup, minimum.
Sparknotes: Learn how your gun "feels" when it malfunctions, don't rely on your sight to diagnose a condition, as it takes it your eyes off the suspect and could cause him to escape or kill you. Focus on clearing your pistol without looking at it.
My 2 cents.