nino, with the abject splatting failure of #5 I went straight to a fast powder as is usually recommended. I used Accurate #2 #2 is bulky, and that allows for more consistent measuring. it also allows you to more easily see any mischarges. a double with #2 is usually so large that it won't even fit the cartridge and will spill out.
I started out with #5 because of the failure to cycle rounds that I was getting, I wanted a slower, heavier charge that would add extra push without increasing pressure. It would have worked much better if the charge had burned properly and I had an extra inch of barrel, and if I had maxed the charges.
There really isn't any reason to use a slower powder like accurate 5 or hs6, any of the medium rate powders, there is nothing to gain in a short barreled micro pistol, your velocity or energy won't be increased significantly. It is really recommended by the majority of people, in my readings, that faster powders such as bullseye, #2, 231 win or hodgdon hp38or the various quick to moderately quick burning powders be used.
#2 was my choice because I already had it, it works well. Anything that you have that is in this range is quite a reasonable thing to try. Here is a chart from accurate powder company that lists a few brands in a chart that you can look at.
http://www.accuratepowder.com/wp-content/uploads/2010/12/burn_rates.pdf
Seriously, I'm not trying to shill for accurate, but it works well in everything I load to create moderate power target type loads in small things like 9 mm and .38 special, and it can be used in bigger cartridges as well.
If you have none of the recommended ones look at this chart and buy something between the #2 spot and bullseye, I guess that I would recommend 231/hp38 as the best choice.