I'd like to go 22 or 20 when I rebarrel. Having said that, I do shoot 600+ here in Wyoming . I ordered an Ultra 5 suppressor which will help some. Been looking rebarreling to the 280 Ackley to see if I can make up the difference of a shorter barrel there.
I settled on 22", velocity with 185 Berger VLD hunting bullets and Ramshot Hunter powder is just a tick over 2700fps. That's through a suppressor as well.