Yelum,
I use both 140 & 150gr in my 280, just depends on what i'm hunting. I use IMR4350 & 150gr Nosler Partitions for muledeer. My loads are 2910 FPS & i would also use this load for elk. The 140gr accubond is the load i mentioned in my first post.
Muzz, I tpically like heavier bullets for elk but i would not hesitate to use the 140gr accubond. You might get 3000 FPS just becareful of excessive pressure.
7 Mag