The 50 ae made some sense before the 500 S&W brass was available to cut down, but really doesn't make any sense today.

The 475's easily launch up to 440 gr, I got a bit carried away with a custom mold and ended up with a 460 gr WFN that my 480 had no problem pushing 1100 fps.

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If you just have to launch 500 gr, then the 50's come into their own.