Personally I don't see the reasoning behind it. If I wanted a fast .17 I'd go with the original .17 Remington. I used to do a lot of varmint hunting with a .220 Swift so I never needed a fast .17. I had a heavy barreled Ruger M77 in the Swift topped off with a 6x24 Bausch & Lomb. It was absolutely deadly on coyotes and prairie dogs back in my native CO. While suffering from an advanced case of stupidity I traded it off for a .243. Bad, bad trade. But, things happen over the course of a lifetime.