Have three new rifles this year and my time and practice was spent on the other two due to hunts where I needed those rifles. Just turning my attn to the 280ai, though I have done some small load development sessions and nothing jumped out at me, so I shelved it until I had time for it. Well, now I have time for it. Right now I have H1000, N560, and H4350. A load was sent with the rifle using H1000 but it is around 2800 FPS and I should be able to easily get 100-150 FPS more out of it. This is going in a 25” 8 twist barreled custom and I can seat the bullets out as far as I like. Anyone point me in the right direction? I will work up to any and all loads, just looking to see what people are getting velocity wise with various powders, and how much powder it takes to get there.