I just checked my Hornady manual and it lists the length of their loaded 500gr. XTP bullet at 2.040".

They also list the maximum cartridge overall length as 2.040"

Maybe they're just a little too long.

But they should be too long for all the chambers. Usually there is a problem if you are shooting shorter cases then going to longer ones. With all the cases the same length you shouldn't have that much of a problem. If that is the case please let us know.