From this past week.
My brother killed a bull in Montana at 388 yards with my 7-08 and 140 accubonds last week.
Recovered the bullet on the point of the off shoulder just under the hide. Shot was slightly quartered, went in tight behind shoulder mid-body, broke ribs on both entry and exit, and angled forward to the point of the off shoulder.
Considering MV of 2850, 388 yards and what that bullet went through, I'd say about perfect. Helps to make a good shot and the bull went about 5 yards.
Yesterday, shot my bull with a 7RM and 140 etips, MV of 3100, distance was 336 yards. Bull went maybe 20 yards hit behind the shoulder on the on-side, bullet was under hide on the off side shoulder.
I'm calling that marginal bullet expansion, enough to get the job done, but glad I had them moving as fast as I did.
I've shot 3 elk, 1 deer, and a moose with the etips. My Dad shot 2 elk with the same rifle. They work no doubt, but not as well as the accubonds from what I've seen.
If I were to move to using them exclusively, I would drop bullet weight and make them move as quick as possible. I flat wouldn't shoot 140 e-tips out of a 7-08unless I never planned to shoot over 200 yards. Still probably wouldn't even then since there's just much better bullets available.
My first hand experience.