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HydraShok vs. Hi-Shok

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what is the difference between these two rounds, when both loaded in 230 gr.? i went to Federal's website, and other than one being the "Premium" and the other "Classic" ammo, their specs are identical. I ask because i received a large quantity of the Hi-Shok, and want to see how it compares with the old stand by Hydra Shok.