My Lyman lists loads for 95 gr FMJ only. However, the Titegroup loads for 95 gr FMJ, 90 gr Jacketed HP, and 90 gr cast are all the same, 2.4 gr-2.7gr.
Power pistol loads for these rounds are 3.5gr-3.9gr, 3.6gr-4.0gr, and 3.8gr-4.3 gr, respectively.
Now the load info that came with my Lee .380 die set is a little different. They have 95gr jacketed listed with 2.7gr-3.2gr of Titegroup, and 4.2gr-4.7gr Power Pistol. There were no cast loads listed.
Given the fact that cast bullets require less powder than jacketed, I'd say start with a mild load & go from there.
Personally I shoot 100 gr TC cast bullets over 2.8gr of AA#2, and 95 gr cast RN over 3.5gr AA#2. Occasionally the longer TC bullets will jam in my Kel-Tec, but never in my Bersa. I doubt you'll have any soprt of feed problems with the RN bullets. As far as crimp goes, your definately going to need one. I would suspect your dies are set up for a taper crimp, rather than a roll crimp.
What brand of dies are you using? Are they carbide? If not you'll need a case lube so they don't stick in the sizing die.
As far as barrle length goes, I wouldn't worry too much about it. I've never heard of a long barrel .380.
If you're hesitant to use the loads I've listed here you can always contact the customer service dept at Titegroup & Power Pistol. I've done that with Accurate & Alliant with success.
Good luck with your loads & be sure to p[ost your results.
GH1