Not the "7-300PRC" or 300PRC necked to 7mm.
It is an XM or LA cartridge, but not a full length LA...if that makes sense? An XXM cartridge?
A specced 180 @ 2950 is not beating the 7RM at anything except MAYBE in anemic factory loads? My 7RM pushes a 180 @ 2996 w. H1000 or a 184 @ 3050 w. RL26. Heck, a 7SAUM or .280AI can push a 180 @ 2900+. My 24" 7SS can push a 184 @ 2912.
Then there is the 7 Max, 7Mega, 7WSM, 7LRM, 7 Blaser Mag, Lazzeroni Firebird and Tomahawk, 7Wby, 28 Nosler, 7 RUM....
I think once handloaders get ahold of this, the performance numbers will increase, and I applaud innovation and new cartridge designs, but this mid-sized case doesn't make me all tingly. As popular as the 28 Nosler is, they would have been better off (in my opinion) of going a bit longer to a true LA case and keeping velocities in the 3050 range. Too many handloaders will match the 7PRC specs with what they already have.
But the "ooh, bright and shiny and new!" crowd should eat it up.