After Western bought Winchester in December, 1931, did they still produce ammo under the Winchester name?

I saw a picture of a Box of the special .30-06 ('single load only') ammo with copper jacketed bullets. I assumed it was simply too long to feed through the Model 54 Winchester's magazine and was intended for long range 'slow fire'.

IIRC - The model 54 was manufactured from 1925 to 1930.

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