Yes I have shot them prior to knowing what the runout was and they did ot beat or match or even get close to being as accurate as the 123gr Hornady ELDM factory ammo. The factory stuff has far less runout than I have. It's very frustrating to me to see my runout that poor. Either its something to do with the process or equipment related to the Grendel reloading. My 308 is making good ammo. Their is something going on that I need to figure out because, it could give me issues on other ammo I reload in the future. Would really stink to get a F class rifle and feed junk ammo to it. There has to be something I am missing or doing wrong.So do you have a match chamber in the Grendel AR? If not, it probably won’t matter that much, especially if you are loading from the magazine. The main question is have you shot those loads to see how they perform?
You may be obsessing over a detail that isn’t important for the platform you are shooting.