More like 2100 fps with 150's in an 18 inch barrel- see Hodgdon load data. To get reasonable performance in a .30 caliber, the case needs to hold about 36 grains or more IMO to duplicate .30-30 performance with 150's.
You're estimation is off a bit...
My Remington Model 7 in 300BO has a 16" barrel, shooting Speer's 150 grain bullet (#308150BLKGDB) I get approx. 2,150 fps using Speers load data for Lil'Gun. Granted this is the only powder they list as doing 2,100+ fps.
Regarding Speers load data, my results are pretty close to their velocity, except with Accurate 1680, which is a little faster in my rifle.
So, getting 2,150 fps in a 300BO, I'm confident that 2,300 fps in the 300 Ham'r should be doable... But I would like to see some real world data.
Jerry