Shep, you can shoot any factory ammunititon (other than Light Magnums by Hornady) in that rifle and she will be fine. You probably have a Grade II instead of a MK II since it was built in 1982.
If you'd like a little more info check out this sight
"No free man shall ever be debarred the use of arms. The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government"
-- Thomas Jefferson, 1 Thomas Jefferson Papers, 334