rnb, welcome to the forum!
The Beretta O/U double rifles have a well deserved good reputation.
They are very nicely made and usually seem to shoot well.
A friend of mine uses a Beretta Silver Sable in 9.3x74 and he loves it.
The Beretta Gold and Silver Sable O/U's are nice slim trim good handling double rifles.
Someone here should be able to help you with some starting loads.