. . . pistols unattended behind the firing line MUST also have actions opened and magazines removed (if possible). . .
Now I am under the impression, from watching IDPA shooters, that they shoot until empty, release the slide on the empty magazine, point the gun downrange, pull the trigger and then holster with the gun magazine in the gun (I think). . . then walk off the range.
So the gun is empty but not visibly empty.
Again, I almost exclusively shoot at my home range, but as I've been teaching basic shooting skills to a friend of mine I've watched some IDPA shooting (not much) and the above is what I observed. It differs from what your wrote and different from what I used to do at & off the Trap line, so I am openly wondering if there are SOME MINOR DIFFERENCES in safety/range protocols between different shooting disciplines? This is why I wonder if we should have some sort of written policy that is handed out at the next event?