It has been years, but, IIRC the factory Remington 220 grain CoreLocts went about 2800-ish out of my 24 inch Classic. That load has been discontinued for decades though.
I was able to get 220 grain Barnes Xs up to about 2900 with H4831.
If I was doing it now I would bank heavily on 200 grain TSXs over about all the H1000 I could get in the case.
