Scott,
You might enjoy this site:
http://www.foxcollectors.com/For the forums:
http://www.foxcollectors.com/My%20Forum/phpBB2/index.php"Modern ammo" is a very broad category. It really depends on the condition of the gun and what you are going to be shooting in it. Without examination by a knowledgeable gunsmith it would not be possible to say if the gun is safe.
Here are 2 that should not have been used with modern loads:
Once your gunsmith gives it the OK, then I know many people who use their Fox guns with heavy hunting loads.
Pete
