Ranger, the .475 GNR is almost identical to several rounds that came out at almost the same time involving the blown out .45-70. The most common one I can think of is the .475 JDJ made for the Contender pistol by SSK Industries. There is a review in of this round in JDJ's literature and "Cartridges of the World" any recent volume. In short, it is a fine round, but I think the .50 AK and the .450 AK are more powerful rounds. Larger case volume, same length, yada, yada, yada. While I think the .50 AK would be a slightly more powerful round, I doubt any animal would know the difference between being struck with a .45-70-500, .475-500 JDJ/GNR, or .50-500 AK. Certainly, the .50 AK would be pushing the 500 gr. bullet faster than the .475 JDJ/GNR (loaded to the same pressures) and that would gain you a bit more "thump" and penetration.
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