I shot my 7 PRC today with 175gr ELD-X powered by N568 powder.
I got a 0.3" group with 68.0gr of powder at avg 2,806 avg fps
I got a 0.45" group with 70.0 powder at 2,900 avg fps.
I got a 0.2" group with 71.0gr powder at 2,940 avg fps.
The 71.0 gr load did not show any signs of pressure...