I've tried the 2400, too. Back before the "powder renaissance" of the 1970s that started to give us literally dozens of powder choices, the ones that seemed to show up most often in loading manuals were Bullseye, Unique, 2400, and SRs 7625 and 4756, and IMR 4227 (my powder of choice for loading .25-20).
I've got my 1970 Lyman 45 sitting in front of me, and they have loads for 112-grain cast lead bullets using 2400. I've tried similar loads using a 120-gr. cast bullet, and to say it was dirty, even with a heavy crimp, would be an understatement.
This Lyman manual (remember, it's going on 40 years old, so use the data at your own peril), lists bullet 358311 with a starting load of 8 grains of 2400 for 690 fps, and 11 grains for 1010 fps.
I don't think bullet mold 358311 is made anymore.
Mold 358156, which Wil Terry references, is a gas check variant.
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