Greetings @Micky Duck and All,
Warren Page designed 6mm wildcats that he tried to interest both Remington and Winchester in introducing. He succeeded rather too well. Winchester had in mind a hunting cartridge that could be used for varmints and Remington a varmint cartridge that could be used for hunting. In line with the thinking at the time the .243 Win got a 10" twist and the .244 Rem a 12" which would not stabilise the 100 grain projectile. Remington reacted by increasing the twist to 9" and later renaming the cartridge the 6mm Remington but the horse had already bolted. It appears that Remington may have given their Model 700 rifles in .243 a 9" twist as well at least for a time. In many ways the 6mm is a better cartridge than the .243 but it is pretty much dead now.
Regards Grandpamac.
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