I recall the Remington Accelerator ammo of the late 1970's and found it kind of a fascinating concept. But then it seemed to vanish as quickly as it appeared. Never heard an official reason for that but all the unofficial scuttlebutt I heard was, "It didn't sell" and left me wondering if poor sales were due to guys hesitant to try new stuff, or else the stuff didn't perform and the word got around in those pre-internet days that it was crap.