Due to a destroyed vision in my right eye since the age of 13, while being right-handed I've always shot South Paw.
Shouldering a gun on the right is down right weird.
I cannot deal with left opening top levers though. I get my stocks bent with 3/8" of cast-on. Less for the rifles. Some of them sport a cheek piece on the wrong side (for me).
I do have a 1929 Purdey 16 bore which has been originally made for a Lefty, but with regular top lever. One could have got anything from them, for the right amount.
The trigger sequence makes no difference. Sometimes, the triggers have to be bent to be comfortable.
The Jones ULs are bad news though, as for speed....
The worst case is bolt actions. I have simply never seen a vintage LH one. So I am stuck with "new" BA rifles.
Best regards,
WC-