I have said this here before, the Accubond does not leave large holes on exit because the expanded section stays close to the shank and the mushroom stays relatively small. On comparison, the BT opens wide.
I have several recovered Accubonds, from 25 cal (110g) through to 37 cal (260/300g) and they all exhibit smaller mushrooms.
The cup and core bullets I have recovered, including Berger's, have all got large mushrooms and DO NOT penetrate like an Accubond does.
Have shot the full length of several Sambar and NZ Elk with 30/33/37 Accubonds and they leave a nice large permanent wound channel that initially takes a few inches to expand fully and tapers to 1.5 cal wide all the way until they stop. Berger on the other hand, have huge permanent wound channel and then tapers to just over cal, if there is any significant pieces left.
Another bullet that produces smaller mushrooms are the Speer Hot Cor, for the same reasons above.
I have been using Accubonds since they first came out, and am now using the ABLR with good success.
I'm not gonna bash other bullets, but I found on 6 occasions that Berger bullets cannot be relied upon to expand at longer ranges. This was all the same bullet in 338.
Cheers.