I have Ranch, Revolver Supply and TK Custom clips. All are segregated to whatever ammo works. They range from .020 to .025. I must say that I like my reloads to be nearly rigid. Too floppy and they tend to bollix up my reloads.
I will be shooting a steel match (my first in nearly 10-years). My custom 627-5 Pro Series gets the nod. I'll use three of the Blade-Tech Moonclip Holders.
I am using .357 Blazer Brass (because I have 3200 rds of it...), which I found works best with .022 thickness clips. Nearly no movement with a slight hint of wobble to "feel" the way into the 627's chambers.
For Speer ammo (.38 135gr GDHP), the .025 clips work best. For my HD loads (my 627-5 is my nightstand gun), the TK Custom clips wrk best with my .38 Golden Saber 125gr +Ps. Not sure what thickness the TK clips are, but they have nearly no movement and are damn quick to reload.
With the panoply of clips out there, do yourself a favor and sample them. The Revolver Supply clips come in several thicknesses. I will buy more in .020, .022 and .025 variations. That way, I'm covered. The Ranch clips are also goo, but seem to bend easily.
Cheers!