Redhawk, nope, never heard of a 460 unlatching either, like I said, I haven't shot a 460 to full potential, but I would still expect the 500 to have the most recoil in the end due to the much heavier bullet. I'm sure they use the same spring in both cals., and the fact the 460's never have a problem only tells me they need maybe a 1 lb. stiffer spring in the 500's. I think it is just the little extra recoil that is unlatching it. If Smith can't fix it I can, and will post a note outlining my findings. Maybe they'll get it right this time, and I won't have to fiddle with it.