Does anyone know if these will work with HKS 7-round speedloaders for a .357 mag k-frame?

The item in question is shown in the picture with this story from the latest GUNS Magazine.

I like the concept, but am worried about the fit. They're not expensive so I may just buy one and see for myself.

http://www.gunsmagazine.com/DHG1108.html

I've got these carriers - never worked for me for whatever reason. I've actually had them fall out of the carrier just walking around. I've gone to a nylon camera bag on the belt. They hold 2 - 3 speedloaders and are very benign looking.

Good luck,

Dave