66.5 of RL22 pushed Barnes 145LRX at 3,100 for me with great accuracy. Granted different bullets, guns etc. but I'd say that isn't too far off what to expect.
Through my load testing, all bullets were slower than what I expected out of my 7RM. That's why I have a Mashburn reamer screaming at me to have it run up a barrel.
Four of a kind: 7x57, 284 winchester,7 Rem Mag, 7 Mashburn.