From what I've seen with bears, my experience is with Brown bears, the shot placement is what makes or breaks the situation.
For a bear not to run, the shot must be in the shoulder and connecting BOTH, or high enough to take out the spine as well.
My first time out was with a 338 and 250gr Partitions. They worked, but did not anchor the animal, it spun and came straight at us, a second shot under the chin at 20 dropped it. I then used the 275gr Speer Semi Spitzer in my 338. Phil Shoemaker and his daughter weren't fond of 338's, but I convinced them otherwise.
In the following years guiding, I moved to a 375 Weatherby using 300gr Woodleigh Weldcore PP's or 300gr Partitions.
Have seen Kodak's taken with 7mm's and have seen both failures and success. Some 7mm bullets are just too hard IMHO.
Since having the 7STW, which is my first 7mm cartridge, I am beginning to see this trend of hard Bullets, so I am using ABLR and BT's on our small deer here. Have not tried to take a Sambar yet, which are only just smaller than Elk in weight (300kg on the hoof).
Cheers.