When we had an informal PPC league going here years ago and speedy reloads were a part of the game, the biggest majority of shooters used either Jet™ loaders or Safariland™ Comp II or III loaders.
I personally have used HKS™ in a variety of frame sizes and calibers, but find them slower and much more cumbersome to use, and usually buy them for guns for which Safariland™ makes now loaders. So when it came time to accessorize my newly acquired Model 686, I just naturally bought 3 Safariland™ Comp IIs and never looked back. This is just my personal experience, but as Rick Hunter would say, "Works for me!"
Froggie