What is a Bore Rider throat? This ia the first I've hear of it. What is your COAL your version of the 30 Nosler? I asume it is a s standard 30 Nosler with the Rider Throat you mentioned?We had PTG (Dave Kiff) make the reamers with the Bore Rider Throat. And I really like that. We have several reamers with that throat and will have more.