Only thing I know is from a couple of magazine articles. Boddington, in Guns & Ammo, did a hunt in Texas and was quite favorable about the cartridge.
It looks like a good one for handloading, as you can load down for casual shooting, for "just plinking". And, with the newer designs in light bullets, it ought to be a good varmint getter...
The package idea of a shorter, stiffer action plus the more efficient powder burn of the short case all combining to give better accuracy is not yet totally proven, but seems reasonable in light of benchrest experience.
Art