I conceal carry the Safariland COMP II's in the Safariland Spring Steel CD-2 Carriers.
I have 3 Pair on my dresser.
Pair 1 would be K Frame Comp II's loaded with 38 Special +P Speer 135 GDHP Short Barrel.
For: 15-5 Snub, 315 Night Guard, 10-5 Snub, and my 64.
Pair 2 would be another K Frame Comp II loaded with Speer 357 Magnum 135 GDHP Short Barrel.
For: S&W 66-2 with 3" barrel.
Pair 3 would be L Frame Comp II's loaded again with Speer 135 GDHP Short Barrel 357 Magnum.
For: 4" 686-5.
My next choice would be the L Frame Jet Loader carried in a Big Creek carrier. The Jet Loader is smaller than the Safariland Comp III. I would rate is as small enough for belt carry.
This is what an L Frame Jet Loader looks like in a Big Creek Carrier.
The HKS will work ok, and has for years. My problem with HKS Speed Loaders is no good belt carriers for them. I guess I could cure that problem by making a Big Creek carrier for it from Kydex.
Which ever carrier you go with, you probably need to stick with one brand and model.
The Safariland Comp I, II, and III, as well as Jet Loaders just push down into the cylinder to release. No Knob to turn. This is a great system as long as everything clears. Normally this is not an issue on an L Frame. Grips and Cylinder Release can cause clearance problems on some K and J Frames.
The HKS speed loaders releases by turning the knob clock wise. Not quite as fast as a Safarliand, but they work well, and have for years.
Some other brands of turn knob speed loaders turn backwards from HKS.
I use several different revolvers in matches using multiple speed loader designs. I can deal with all Safariland, Jet Loaders, and Speed Bee'z for my 22. Just push down to release.
With HKS a clock wise turn of the knob while holding the cylinder releases the ammunition. That is all the designs I plan to work with. I do not need a speed loader that releases by turning counter clock wise.
Which ever you go with, practice using it.
Midway is a good source for HKS and Safariland when on sale.
I get Jet Loaders from Pistoleer, who also carries Safariland.
Bob