Wildman,
I'll give you two loads I fired several thousand rounds of back in the mid to late 1970s when Hercules was still making 2400.
First was a 38 Special load I shot in a 3-screw, Flat-top Ruger Blackhawk with a 4-5/8" barrel. Shot some in the 6-1/2" Blackhawk I also owned but the large majority were through the old Flat-top. I cast Lyman's 358429 out of wheel-weights for 168g SWCs. Put them in 38 Special cases charged with 10.5g of 2400, ignited by a standard SP primer (mostly CCIs back then).
My other favorite Ruger back then was a 3-screw, Flat-top 44 Blackhawk and I mean the original 44 Mag Ruger from before the Super Blackhawk was introduced. I had a couple of them but my favorite shooter was a finished challenged 6-1/2" that had a great trigger and shot my chosen load better than I could hold off hand. Elmer Keith's 44 Mag load was his 429421 bullet over 22g of 2400. I used the same bullet, cast from wheel-weights of course, but my old Flat-top Ruger liked 21g better than Elmer's load. Like Elmer I used standard LP primers to set them off. Hercules 2400 didn't need Magnum Pistol Primers to get going and shoot just fine.
That may not have been exactly what you were looking for but your listing of Hercules 2400 brought back a bunch of good memories of regular trips to the desert with a buddy where we busted up a lot of rocks and tried penetration tests on Mesquite and Ironwood stumps. (smiley face goes here)
Dave