You did not mention what revolver you are carrying. That does make a difference.
Added: I normally carry strong side in a belt holster. I seldom pocket carry, and only then my 442.
My theory is, If I can conceal my handgun on the belt, I can also carry a hi quality Speed Loader.
K and L Frame: I carry Safariland Comp II speed loaders in a Safariland CD-2 belt carrier. I have 3 pair of carriers.
My K Frame Safariland Comp II speed loaders carrying 38+P are unmarked.
My K Frame Safariland Comp II speed loaders carrying 357 Magnum 135 Short Barrel Speer ammunition have a Yellow Dot on top for easy identification.
My L Frame Safariland Comp II speed loaders carrying 357 Magnum 135 grain Short Barrel Speer ammunition have a Green Dot on top for identification.
I swap around between a 64, 315NG, 66, and a 686. I color code all my Safariland speed loaders to keep them straight.
J Frame. I am currently carrying a 442 Pro Moon Clip. I carry my Moon Clip reloads in a California Competition Works 5 Shot J Frame Shoot A Moon Carrier "SAM". It is another spring steel belt carrier similar to the CD-2's.
The J Frame has another option. A J Frame 5 shot Jet Loader, carried in a Big Creek kydex belt carrier. I make the Open Top Carrier for the J Frame Jet Loader. If you can carry on the belt infront of your holster the J Jet Loader is the fastest J Frame reloading device other than a Moon Clip.
The Jet Loader is very similar to the competition Safariland Comp III.
Grip Clearance needs taken into consideration using a J Jet Loader, just like you need to consider the grips with any other J Frame Speed Loader.
The Jet Loader can also be pocket carried in the cooler months when wearing a coat, vest, or jacket.
Bob