Goodness! that's a new one on me! I've never seen or heard of moon clips for .357 revolvers! How does that work? the rear of the cylynder is milled off to clear the halfmoon/fullmoon clips?
I do know that using fullmoon clips on my M1917 and M625 .45 ACP revolvers greatly speeds up unloading and reloading. I've used them in PPC shooting and on duty as well.
Please tell me more about those .357 moonclips. Make, model, and details, please.