FWIW- I firmly believe that your choice of 180-200gr Partitions in the .300wby is very good.
Most folks rave about the Accubonds, but I have recovered EVERY one that I have shot into both elk and mule deer, and all have lost a lot of weight. 2 yrs ago in Wyoming I put a 200gr AB from my .300 way into the front shoulder knuckle of a very big bull at 408 yds.
It shattered the shoulder big time, but only penetrated 8". It did not make it into the chest cavity at all and only weighs 59grs. He made it about 40yds and was shot again frontally, which ended it quickly. That bullet was lost in the lung soup.
A better choice would have been the Partition or the Barnes TSX/LRX .......
Next time I will be using a 180 Trophy Bonded Tip as they have shown good performance in my expansion/penetration tests and need more field tests to make any useful determinations. 40yrs of field tests with the Partition has shown me how good they really are......... Cheers