Depends. Black bears or Brownies? I live on an island with both; blacks on the North end, Brownies on the South. When hiking around the North end near town, I carry my .45, wife carries her .357.
When we go to the South end, I carry my .308, she carries the 12 gage with magnum bear slugs. One of us will probably also be packing a .44 magnum.
Just black bears here.