Same goes for the Starline....It's fine at AR pressures but it ain't gonna hold up at the load I posted. Wish it would but it DOES NOT.I have 500 pieces of Starline 6.5 Grendel brass to neck down this weekend. I am going to do a skim cut then anneal and neck down in two steps. Will post results when I find the correct process. I will be looking for loaded necks around 0.250”-0.251”.