I'm with the "strong hand reloads" guys, above.
When TSHTF, the only thing that matters (IMHO, of course, take it with a grain) in revolver reloading is A) Taking cover, B) positively clearing brass, C) keeping a massive locked grip on the piece of metal that most ensures your survival (which is now the cylinder, nobody gives a rip if the frame of the empty gun flaps around) and D) getting those skinny little missiles poked into their skinny little silos reliably.
I personally vote for delatching the cylinder with the RH thumb as the LH pushes the cylinder out; pointing the business end skyward (gun still held in RH) while the LH smacks the dickens out of the ejector rod, then immediately grabs the cylinder, cupping it and hanging on for dear life, with the rod rebounding back up through whatever fingers it ends up through (in between the index and middle, or middle and ring, ideally) while the strong hand (RH) indexes/rattles the new rounds into place, spins the (HKS) knob–and promptly lets go–which will send the loader flying off into space as the RH re-acquires a firing/fighting grip and the LH thumb shuts the cylinder. The LH can then slide down and support grip; or let go to fend, gain footing, or whatever.
This may not sound fast, but it’s steady and reliable, and it can be eye-opening when someone practiced up keeps up with less dedicated Auto shooters this way–one can be back on target and pressing the trigger before the loader has even finished pinballing between your inner arms, let alone hit the ground. This reload also works standing, sitting, kneeling, crouching or moving (the idea of, say, trying to recharge my smith with my left hand while scooting around a car body to avoid someone trying to hit me with a board or something gives me the willies); and is about the only thing I’ve personally tried that can “sort of” work by feel prone (say, when a high curb is all you have for cover), so long as you don’t mind scratches on the underside of the end of your barrel. My opinion, anyway, FWIW–I’m just a guy though, and certainly no pro operator.