I started reloading .380 ACP in 1964 for a Beretta 1934. My first efforts were with a Lyman 310 tool. I was casting 95 grain RN bullets with free linotype metal. I quickly tired of the 310 tool and switched to a Lyman turret press, which I still have. I sold my old steel dies and switched to a set of Lee carbide dies around 1995 and still use those. I also crimp with the Lee FCD die. Reloading for .380 is similar to reloading for other straight wall auto cartridges like .45 ACP. The cartridge headspaces on the case mouth, so taper crimping is required, not roll crimping. There's lots of reloading data in all the major manuals. I've had good results with several fast burning powders including Bullseye, HP-38, and currently VV N320. I've used cast, plated, and FMJ bullets with the Hornady 100 grain FMJ being my favorite. I like its blunt round nose design and got a good deal on a 3500 round box before COVID. Loading with heavier bullets is trickier because there's not much data and limited powder space in a deep seated heavy bullet.
It's interesting that you asked this question today, since I was at the range this morning and fired a box of .380 reloads through my SIG P232 with excellent results. The gun is on my hip right now. I mainly shoot the SIG and a Walther PPK in .380. I know the 9 mm is a "better" defense cartridge, but I really like reloading the .380 and shooting it. Then again, I also reload cartridges from .25 ACP to .454 Casull.