358 Winchester

Does anyone have any experience with this round? I've thought of using it in project guns, being a necked up 308 and able to use some of the same components with a heavier bullet and wider cross section, meaning harder hitting AND through the quirks of Physics will likely be more efficient with the powder used, as in how much bullet energy you get for each grain of powder.
Also the ability to use 9mm and 357 pistol bullets means many options in experimenting.

If you've hunted with it, what did you use it on and what is it sufficient for?