RE: 412 lb buck in Nebraska?
I dont know if this is real or not, but a deer that size is certainly possible.
There have been two bucks shot in minnesota that had est. live weight of 511lbs. both dressed out at 424lbs I think, (I have also heard 402lbs I think dnr said 424lbs) One was shot in the 20s, and one was shot in the 80s.
Its hard to find information about it, there used to be some on the minnesota dnr website, I dont know if it is there anymore or not, but you could probably call them and get the information if you really wanted it.