That is for quite a long CoL. I think you will be limited to 2.820" in the Kimber, maybe a little less, in which case I wouldn't jump in at 41gr. Shorter CoL will crank up the peak pressure. Try 38-39gr. I think you will be close to your target MV. Remember too that you will be 250-300 ft/sec down on a 22" barrel. That is probably the length used for the book figures.
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