Hey, I'm in the same boat. I'm the originator of the phrase "I'd give my right arm to be ambidextrous!" Seriously, I can't eat with my left hand, can't use a hammer with my left hand, can't even wipe...well, you get the ugly picture.
Yet, with a surprisingly small amount of practice, I was able to learn to reload left-handed. The real trick is to use Safariland speedloaders - they're faster to get into the cylinder, and faster to release the rounds. In addition, since the release is a push rather than a turn, you don't need to figure out a way to hold the cylinder from turning as you do with the HKS.
The only thing faster is moonclips - which, BTW, is how Jerry is able to reload so quickly.