I have shot a friends and was very impressed with the 300 yard and up accuracy, way more capable then a 223/5.56. I'm keeping an eye on the cartridge for now, I may go down the 6mm Arc path.
Take the game kings to the range and have some fun. When you find them buy some Rem corelokts or federal power points. In my experiences the game kings acted like a FMJ or BTHP bullet.