The 6.5 Remington Magnum was also apparently the product of a fevered theorist at Remington. The intent was to provide .270-like ballistics in a "woods carbine," but apparently not many woods hunters wanted .270 ballistics.
With the major exception of the 7mm Magnum, Remington seems to have had pretty poor luck with their "metric caliber" introductions. That said, the 7mm SAUM is still hanging on, though more as a target round than for hunting. This kind of puzzled me--I owned and hunted with one considerably after it came out, and it was basically a short-action .280 AI, and introduced when short actions were getting a lot of love.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
