2900-2960 fps w/139-140s in factory 7/08s w/chopped 21" bbls.

If I needed more in a SA rifle w/my preferred hunting length bbl (22-23 max), I'd go to the 7 WSM, but the 284 in a 24-26" is in it's own right also a fine round, esp. using 160-162s or heavier IMHO.

For deer thru elk to 400 yds, I'd be very happy w/an accurate 7/08 loaded with good bullets, and not choose any 7mm larger, but that is just me.

That said, there are no flies on a 284, just less brass and ammo options and perhaps one less in the mag, and to some folks those things matter.