I own a 10-shot S&W 617 revolver. A while back I picked up a Speed Beez (http://speed-beez.webstorepowered.com/
) 617 speedloader and one of the accompanying loading blocks (the one that holds eight speedloaders’ worth of ammo). I had a chance to try it out this weekend. If you shoot a .22 revolver, these things are great. The speedloader works really well, and I found it faster and easier to place rounds in the loading block than in the revolver itself. Also, you can be loading the block during cease-fires and the like, or even load the block at home and bring it along in a case. Loading is as simple as pushing the loader down over the circle of ammo until the rounds snap into place, and then you line up the rounds in the cylinder and give a healthy push to seat them. The products are a little expensive, but the combo of a speedloader and loading block makes it much faster and easier to shoot a double-action .22 revolver. A full loading block is like having multiple spare loaded magazines. In addition to both 6- and 10-shot versions of the 617, they also make loaders and blocks for other .22 and.22 WMR S&W revolvers as well as Ruger and Taurus .22 and.22 WMR revolvers.
The only bad thing about the Speed Beez loaders is that they probably wouldn’t work for someone who is limited to a .22 or .22 WMR for concealed carry. The rounds are held in place solely by a spring than snaps over the rim of each cartridge, so they’re not held securely enough to, for example, drop the loader into a pocket or something like that. The cartridges would probably work loose.