I do remember reading although I can’t remember where, that the 300 Savage was tested extensively as a light machine gun round in the late 40’s.
As I remember, it seems that there were feeding issues with the 300 Savage having something to do with the neck.
A result of this testing resulted in the birth of the 308 Winchester.
Now, I probably don’t have all of the details correct concerning the issue because it’s been awhile since I read that but someone on here would know and could refresh my memory.
