Looks like a .351 redux to me. Just a different rifle to send it downrange. Of course, there's nothing new under the sun.
The performance/capacity has long been there via a smattering of 'cats,but the 223 Parent is a huge foot in the door,by literal default.
Hint...............
Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."