I put together a 6.5-280AI (280AI necked down to .264) and have been working on some hand loads. There is not a lot of data available so I’ve been cautious. Worked up to 55g of H1000 giving me 2800fps with 156 Bergers. All the fired cases are showing the same “scratch” mark which I am puzzled by. You can catch the scratch with your finger nail. I’m wondering if it’s a pressure indicator or a rough spot or burr in the brand new chamber. Also wondering if you guys think the primers look pancaked. No issues with the bolt sticking when ejecting. I’d appreciate any help.IMG_6593.jpg