I'm not a fan of using the 270, 280, 30-06 case etc in the Tikka action if building a rifle. Tikka actions aren't very long. They are perfect for cartridges like the 6.5 prc, 7mm blazer, Sherman mags, etc. If you don't mind shoving the high bc bullets way down in the case than its no big deal. But if you are building a 280ai on a Tikka and using up case capacity with the bullet, you might as well build something like the 284, 7mm-08, etc. You could seat the bullet properly and have about the same capacity.