I’d load the 180 SSTs with whichever is more accurate and Mount the scope you like on it. While it’s evening hunting we used old Weavers and Redfield’s for the same sorta hunt when I was young and don’t remember not being able to kill a bear due to the scope.
The SSTs will work great for what you’re doing. Fast opening and lots of bullet to push through. Black bear aren’t all that hard to kill.
Good luck on the hunt prep.
