For the same reason that some folks buy their guns in .44 Special and not .44 Magnum.
Because the special does all they want in a gun. If they wanted a magnum, they would buy one. There is still a market for both buyers to choose from.
The .44 special was almost lost when the magnum came out. Demand fell off sharply. That apparently hasn't happened with the .38 special.
It looks like Kimber went with what you may be thinking; .357 only.
Anyone guess how many more pages are left in this question?
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