I have had very similar experiences with the .416 on buffalo and whatever else I have shot--and agree with Marrakai in that pass throughs are not uncommon when taken through the lungs-unfortunately I learned this at the cost of shooting through one bull and also killing another bull standing on the off side of the first bull I shot..so based on your study--it took one bullet to kill two..not sure what that does to your numbers but it has to bring up the averages a bit..

I find the info very controversal, as described by others in this blog.. there are so many different circumstances, bullet types, types of shooters, ete.. that have a huge impact on results.

As to a double--I looked at several 450/400's while in Reno--of all on the "Entry" level..IMHO-I like the Heym the best--a bit more than some of the others but the quality is readily apparent when viewing the firearm..

Ripp