J.A.Hunter (over 1000 Rhino and 600 elephants on control) book called "Hunter", see chapter 14, page 220-221, also his quote "I have a lot of friends in Nairobi cemetary who trusted in bolt action rifles, for myself I used a pair of .500 Hollands and if they had once let me down I would not be writing this"........that being said Selby, Aagaard and loads of others used bolts, the argument will never be answered but nowadays, since you MUST have a PH and thus backup, a double has to be more "pukka", just sentimentalism on my part I suppose, best, Mike