I believe it was one of Ackley's books, that listed the 7 x 57 necked up to 30 caliber...

of course it was a wildcat, it was in the 50s and was called the 30 American IIRC....

"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC

“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez