Thanks for proving my point ... You are again comparing an improved wildcat cartridge with a throat that would make Weatherby proud, along with an extended COAL , to a standard factory cartridge ....
now take the 30 Nosler SAAMI throat & 3.340" coal with the 245 gr bullet and apply it to the 300 PRC .... bullet will go deep into powder space & case mouth will be past the ogive curve of the bullet, and you aren't gonna go much faster than the 300 Win Mag .....
To make it interesting , (& Ryan Pierce proved it .....) take the original length Nosler case and wildcat it to max dims & throat the snot out of it and run it hot with select powders for mondo velocity .... then it's like .. 300 PRC ? Never heard of the .......... !
To avoid all that nonsense, a fella can simply pick up a 300 RUM and be miles ahead