I'm wondering which powder bar is best for reloading the 380 Auto on my RL 550B.  Powder charges will typically range from 2.6 to 3.6 grains.  I believe the small powder bar is good down to about 3.0 grains.  Should I be using the extra small powder bar?  What is the recommended range for the extra small powder bar?  Thanks for your help.

Rick