Drop to a 100G bullet and you will get closer to the 2700 mark.
But truthfully its just a number and the lil Grendel does just fine at about 2400 with good bullets!
I took my best deer to date with a 6.5 Grendel and a 120 Gold Dot bullet at almost 2600. (22" barrel seated very long in a Bolt gun) The deer was over 300# on the hoof and VERY long bugger! I could barely get his nose off the ground on my gambrel that tops out over 90" high.
I have used the old Sierra Pro Hunter 120 in my Sweede for many years and wanted them for the Grendel last year but none could be found for months!! I got some now and have worked up a good load with Benchmark but haven't chrono graphed it yet. Probably will be just shy of 2600.
CW