RE: Rem Brass - case seperation
The generally accepted norm for belted magnum cases is to only trust them for hunting up to the second reload. After that, they are subject to case seperation at any time. There is a lot of history on how this case design came into being and why it is still with us today; but the bottom line is that it was considered, at least from an initialdesign standpoint, to be a non-reloadable case.