Just that Dyslexia could be why they dropped 2400 for the 45-70 (and a bunch of others) between 47 & 49... Any cartridge case that would allow a number inversion/volume increase of that magnatude was asking for a lawsuit... unfortunately.
I bought 49 and was terribly dissappointed when my favorite 2400 loads were missing. Glad I kept 47 as a "backup".