I have killed two elk now with my .280AI and 160 grain Accubonds at a mv of 2980' or so. That's with a 25" barrel and pretty much exactly what you would expect to get from a typical 24" 7mmRM. I watched over the shoulder as my dad killed another elk with the same rifle/load. On the one hand, I really like Accubonds and have shot or watched dad shoot a number of deer with them over the years from 25-06 (110), 6.8 spc (110), 280ai (160) and .300Wby (180) at ranges from 20 to 450 yards. I've recovered a few and they all pretty much looked like the expansion pictures nosler used to use to advertise them, with expansion seeming to track perfectly as advertised based on impact velocities, and most of them have given exit wounds on deer and elk. They've been accurate (more accurate than Hornady Interbonds when those were available, but only slightly, in two different rifles) and other than a box of tarnished bullets I got maybe 10 years ago they've just been boringly exactly what they claim to be and I can't criticize them at all. So if you want controlled expansion that's what I'd do.
Now having said that, they are a) expensive, b) relatively low BC by modern standards and perhaps not ideal for good expansion if you hunt at extended ranges, and c) I decided a long time ago I wasn't going to take Texas Heart Shots and therefore don't need insane levels of penetration and from what little I've seen, making an elk bleed from a bullet exit is complicated no matter what caliber you're shooting. In light of all of that, I am slowly moving everything to ELDM or similar match type bullets that retain their velocity well and spend all of their energy making a mess in the animal, not a hole in the dirt behind it.
I guess my point is, I love the Accubonds for what you are describing, but I am personally moving more towards expansion than penetration.