H Richard not sure where you are getting your information but let me set the record straight
The triple deuce or Remington 222 was developed by the Remington genius Mike Walker in around 1950. A small version of the 30-06 case and soon to rule bench rest matches for quite a run.
IMR 3031, 4064, 4198, 4320, and 4227 were all developed and brought out around 1934-1935. 4198 replaced the original IMR #25 for generally smaller capacity cases ranging from 30K to 53K psi. It was never formulated for anything specific but was one powder in the above line up that fit nicely in smaller cases or larger cases with lower pressure. There is more to it than that but just an overview.
Regards
wrf