I used to have a ruger m77 in 280 that I loaded for a few years. About 2850 to 2900 was what I was getting out of it safely. Anything over that and it started piercing the Remington primers I was using or lose accuracy with the cci primers. I figured out that you could get the same speed with a 24 inch 7mm08 that you could with a 22 inch 280 with less powder. That being said, I used RL19 in my 26 inch 280 Encore that got close to 3100 with the Nosler book load of 57 grains.
