jghoghunter-
As you probably know, the .240 Cobra is a sort of 6mm/220 Swift Ackley Improved. Be careful, because there was more than one form of chambering reamer reported for it.
The story of its origin is told in Rifle magazine #63, May-June 1979. The article was written by Bill Corson, who won a national contest for naming the cartridge. Corson lists some published loads from the early days of the cartridge; some of these were overloads in his rifle.
A couple of loads were published in a follow-up letter to the editor in Rifle #65.
Ken Waters wrote one of his typical well-researched articles on the Cobra in Handloader #105, Sept-Oct 1983, page 10. Waters includes some of Warren Page's favorite loads.
The American Rifleman of April 1949, p.60, has a write-up of Cobra history.
The Cobra looks like a fun cartridge to play with.
--Bob
