I've seen people on various forums bemoaning the scarcity of 2400. I've seen it pop up a couple times lately, Natchez has it now.
Rambling:
I got 4lb of it in 2019? near the beginning of my reloading adventure, specifically for reduced rifle loads. I like it in 30-30 with 165gr plain base lead. Because of it's suitability for that purpose, I'm saving it for that. I tried it in 357 when I finally got one (S&W 586 4"), and I liked it but in limited testing didn't find it to be vastly better than True Blue with coated 158 or H110 with j-words. So I'm saving it for the 30-30.
More rambling about 357 powders:
I still need to try AA#9 and N110. Mayyybe IMR4227 if it turns up. Or Shooters World Heavy Pistol (alternative to AA#9)
Cheers,
Backcut