Mostly it's going to be mid range 158 gr for .38. Some .357 for practice and 9mm 115 gr.
I'm using Sierra bullets so I use their data. They have an app for the phone that you can download, but it only shows their bullets. I also have their 6th edition which I like, but again only uses their bullets.
Vihtavuori also has a free app to download, as well as a free to use website. They show N320 for both 38 and 357. I found this for 357 magnum.
Bullet 10,2 g / 158 gr CBC, SJSP C.O.L. 40,0 mm / 1.575 inch
Powder Starting load Maximum load
Type Weight Velocity Weight Velocity
[g] [grs] [m/s] [fps] [g] [grs] [m/s] [fps]
N320 0,38 5.9 337 1106 0,48 7.3 381 1250
N340 0,45 6.9 359 1178 0,56 8.6 414 1358
N350 0,48 7.4 367 1204 0,61 9.4 428 1404
3N37 0,51 7.9 380 1247 0,62 9.6 433 1421
N105 0,64 9.8 406 1332 0,81 12.4 472 1549
N110 0,91 14.1 436 1430 1,11 17.2 508 1667
I also found some 38spcl data for N320, but you would have to determine which bullet is most similar to yours.
I would be happy to share my W231 loads if you'd like, just let me know.
As always, start low and work up to desired results.
chris