If you think that the '06 recoils "a wee bit" - don't even think about the .500 in a 10" tube. That is far more than needed for 100 yard whitetail anyway, although it will certainly work well. For a 10" barrel try a .44 Mag. Plenty of power, moderate recoil compared to the other two, and ammo will be cheaper and easier to find.
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