I used nothing but Safariland my whole LE career, 66, ,686, 629. The best by far. I used to carry 4 of them in a quad pack. I've seen a fair number of guys using HKS drop their rounds when in a hurry when they twisted the knob. If you use the Safariland loaders you will never want to use the HKS. They are a little tricky to load at first but you'll learn to do it easily. I'm talking about standing on the firing line at range. They were common with the cops I worked with in Mo. but here in Fl I've run into plenty of HKS guys who've never seen them and are impressed by them. Try them.