_____________________________
By the way, you are talking about a .500/.416 cartridge; not a .416/.500, you have it reversed. This outstanding cartridge was developed by Kreighoff of German, and is shown and discussed on their website--very informative; take a look at it. Again they developed it specifically to be able to use the .416 Rigby bullets at .416 performance ballistics, in a DOUBLE RIFLE, rather than using the common .416 Rigby cartridge, because it puts more breech pressure, more stress, on a double rifle. Too, they developed it to have a rim on the .500/.416, which makes it impossible for the pawls to slip over rimless cartridge, such as it can and does sometimes do on the .416 Rigby round, the .458 Winchester round, and similar other cartridges, which would be a horrible thing to happen, if you happen to have a cape buff. bearing down on you at the time, intent on killing you. Again, one cannot compare apples to oranges, the modern S2 double rifle action is vastly superior in strength to any and all other modern double rifle actions, even though some people don't want to hear of such a fact, and they can withstand pressures other modern double rifles cannot, due to the outstanding old original design, borrowed by Blaser for their modern S2 ---never mind that some consider the S2 as ugly. The Perugini and Visini double rifle's cost is mostly tied up in best engraving; yet it uses same high quality modern high strength alloy steels in its construction, as does other Italian, German, and French modern double rifles, none of which will hold up through years of firing intense cartridges such as the .416 Rigby, the .458 Winchester, the .30-06 Springfield, etc. THAT VERY REASON IS WHY KREIGHOFF DEVELOPED THE .500/.416 TO BEGIN WITH, RATHER THAN TO SIMPLY USE THE READILY AVAILABLE .416 RIGBY CARTRIDGE FOR THEIR RIFLES.