There was a long gap between the 404, 425 & 416 and the 458WinMag.
I guess there wasn't the craze of trotting out the "New and Improved" that we see in the last 25 years or so.
The 500 Jeffery (& 500 Schuler) came out in that gap - 1926 I think, but after that, not much with commercial success was launched until 1956 when the 458 was introduced.