Like I said, I'm not sure. I don't think they ever had time to GET successful. They'd only been out a year or two before the plant closed. Winchester firearms and Winchester Ammunition aren't even the same company and I don't know which one designed the round. I suspect it was Ammunition, since Browning jumped in with making rifles so quickly. The plant may have had nothing to do with it.
Anyway, just like businesses, far more cartridges fail than succeed, regardless of what they are or are not, it's just the luck of the draw.
Still happily answering to the call-sign Peetza.
You do not HAVE a soul. You ARE a soul. You HAVE a body.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.