The .244 Remington as originally introduced in the M722 platform. Big mistake. The .243 Winchester was chambered in the sexy M70, while the M722 was as ugly as a tugboat - guess which one sold far better? The twist rate fiasco is well know and is the reason the .244 is no longer chambered but the 6mm Remington is.
The M722 was chambered to the following:
.222 Remington
.222 Remington Magnum
.243 WCF
.244 Remington
.257 Roberts
.300 Savage
.308 WCF
.