Yondering, that 358 Herrett looks cool! My Dad had a 357 Herrett Contender barrel many years ago. I didn't know they had a rimless version for the AR.
Thanks!
It's purely a wildcat round, others have done similar versions but this one is my own creation, along with those blue hollow point bullets to go with it. The point is to duplicate 35 Remington ballistics; it does that very well, with less recoil and less powder.