norfdet, I have a J frame that was cut for moon clips. The main reason was for ejection - Not for loading. For fast loading and carry in a pocket look at Jetloaders:

http://www.brownells.com/aspx/NS/store/ProductDetail.as...REVOLVER%20JETLOADER

With moon clips ejection of empties in a J frame with a short ejector rod is easier because one can grab the clip and pull vs grabbing each of 5 cases and pulling them out. As said above the clips are thin and ammo sensitive. Remington and Federal work well but are quite loose (in J frame clips only). One other advantage to moon clips in a ccw gun is loading and unloading often - easier to keep track of a moon clip than individual cartidges.