Don't worry. 2400 is a perfectly good powder for higher end .38 Special loads. I have some here and use it infrequently only because it costs more than twice what Unique or Bullseye does to use.

Alot of guys use it in .357 and .44 cases, ergo the "Magnum" moniker.

Go to the Alliant webpage and check for 2400 loads in the .38.

Good luck!

Drew