I saw in a post that you are shooting the 6.5 Grendel with the 130 Berger. What barrel length and what load are you using. I have two AR Grendel's one 18" and the other 20". I have just started to work with them and experimenting with different powders and bullets. I would appreciate any help. Oh, I am a very experienced hand loader 40+ years so I know to start low and work up to any loads.