I got a couple 100 Grendel cases and started looking in the Hornady 10th Edition reloading manual and there is not data. Which manual are you using to load the 6.5 Grendel? All the guy wanted was about 50 loaded rounds for the cases. I got some data from the Hodgdon website. I was going to trim the case but data on line shows the case trim length from 1.514 to 1.520.