Yes, Load it hot and you just invented the STW. I think it would be cool in 27cal with the new EOL's.Look how the .300 PRC performs above the .300 WM. It can give you a rough idea of what to expect above the 7RM.
There is a fella called "Aaron Hipp" on FB that has a 28" barreled, 7-300 PRC. He said he can push 180's to 3300.