280 AI Results with 175-180g bullets

[osok-1k]

I'm working on a 280 AI build, trying the Ace Sendero profile 1-8 twist and 26". I would like to use Grand powder, Nosler brass and Federal 210 primers. Hornady 162 ELDM will be my starting bullet. I'm not a speed hog and like to keep things around 3k or less. Anyone using Grand?

 

[lancetkenyon]

Here's some rather conservative data provided by Berger for their bullets.
View attachment 621371

I wouldn't say the RL23 info is conservative for charge weight, but is for speed. I have loaded for a lot of .280AIs.
With a 175 Elite and Nosler brass, I find 58.7 to be about max, but speeds are far greater that 2800. 26"=2950+, 24"=2900+, 22"=2840+.
With Peterson brass, drop max charge weight by about .5gr. 58.2 is about max, and speeds about 10fps slower than above. But much better brass.