The Corbon site list these two loads. That price is for 12 rounds.
500 S&W MAG 350 GR. FMJ 1200FPS/1119FTLBS CORBON HUNTER 12 ROUND BOX
The Corbon site list these two loads. That price is for 12 rounds.500 S&W SPEC 350 GR. JHP 1350FPS/1417FTLBS
[HT500S350/12] $27.80
500 S&W SPEC 350 GR. JHP 1350FPS/1417FTLBS
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500 S&W SPEC 350 GR. JHP CORBON HUNTER 1350 FPS/ 1417 FTLBS 12 ROUND BOX