Yes Dear Reader you read this right! A .240 Page Super Pooper.
Which just goes show you, What happens. When you leave some folks unsupervised around real tools & electricity. Some mighty strange things show up at times.
I found this on the net and think that it might be on point! “The 240 PSP is actually the 243W Improved. More appropriately it’s the 240 Page Pooper Improved. Page developed it shortly after the 243W came out. He developed the 240 Page in 1952,prior to either the 308 or 243) but neither Winchester nor Remington would buy his idea, even though it was a better cartridge than the 243W.
The Fred Huntington 243 Rockchuker preceded the 244 Remington. Using the 257 Roberts case it too was a better cartridge than what the factory brought out. The Super Rockchucker is the same as the 244 AI for all practical purposes.
I think company pride and snobbishness prevented either Winchester or Remington from adopting a cartridge that somebody else had designed. Too bad for the shooters.”
Ray
All I know is that I would be laughed off my local range. If the good folks there especially the REALLY Old Timers found out. Grumpy PS I myself think that it is just another name for the 6mm-06!