Played with my 6.5 Grendel today using H322 and 123 Nosler CC's. Real life results at 26.6 gns gave me a muzzle velocity of 2433 FPS average. No ejector marks no pressure signs as far as primer protrusion. GRT has this over Pmax and over 2500 FPS. Backing off on GRT to 25.6 gns gives me FPS pretty much inline with real life. Is it safe to say that my pressure is more inline with GRT's 25.6 load?