I have 4 mags for my SR22 and find that the little thumb slide follower button on the side of the mag works great. I can pull it down and load up the mags as fast as I can pick up the ammo.
I have a full size lula (that I love) for larger calibers, but they make a baby lula for 22's. I don't know if it is compatible with the SR22, as the SR22 mags do have a fairly slanted lips and they do warn about mags like that. They are supposed to be coming out with something to help with those as well.
Here is a link to their site if you want to check it out: http://www.butlercreek.com/products/...ol_loader.html