Sorry for reviving this old thread. I watched the youtube video on this very topic.

http://www.youtube.com/watch?v=jakKUkKTM6c&feature=relmfu

In that video Don Heath speaks of bullet failure from the .416 and the larger exit wound created by the 9.3X62.The same can be seen in the last photo. The report posted here does not mention it.Not criticising,but pointing out what was missing.

Best-
Vikram