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Marlin in those days apparantly did not do a ruger, they did a kimber-their parts were chosen for their gun, an rode along together till done-thus part no.s alone won tell the whole story.
Maybe you know more n me, an maybe you can put it to rest?
Anywho, were lucky that there still are .375s/.356s out there-they really are great cartridges.
The other parts would not go along for the ride during heat treatment, and that�s where the difference in strength would come from. Here are a few part numbers from Marlin schematics:
407690 = Receiver, Marlin and Glenfield 336C (.30-30)
407690 = Receiver, Marlin and Glenfield 336ER (.356 Win)
407690 = Receiver, Marlin and Glenfield 375 (.375 Win)
That�s Marlin�s part numbers and the Marlin drawings they were taken from. The actual description is the same in every case, including for the Model 375:
�Receiver, .30-30, .35, .44, .307 & .356 Cal. (FFL Req'd)*�
Note that the .307 is listed, even though Marlin never shipped any.
I agree those who have .356�s and .375�s are lucky.
