I've been loading 9 and 45. Tonight my cousin came over and I showed him my 550B. He was so impressed he got online and ordered an RL 550B Deluxe Quick Change Assembly and an RL 550B Caliber Conversion Kit in 38sp. I bought some Dillon dies to top off the order. My questions: 1. What if anything is different when loading 38sp vs 9mm? 2. Any differences between 38sp and 357? We will probably also load 357. 3. Any good loads or powders would greatly be appreciated as well. I assume we'll start with unique, but any favorites will be noted. While waiting for responses I'll recheck my ABC's of reloading and my manuals to see if I can find anything interesting. As always, thanks.