Which Elephant Rifle and cartridge?

[mark-hunter]

My BRNO .375H&H have proven itself over and over.

I have ZKK 602 in 375 H&H. I am considering to hunt ele, as my next animal. (if all going well, in planning, there is a lot iffs, etc)

With your experience how would you comment this caliber on elephant?

Brain shots, are clear enough for me.

But in case it happens to get broad side shot to heart/lung area?
What kind of performance or effect of this caliber to be expected?
Or is it better not to take such shots, and try on next chance for a brain shot?