As far as I know the only country that had the .40 cal minimum was Kenya. Kenya of course has long been closed to hunting.
A good man with a good double can pump out 4 rounds as fast as most bolt gunners.
I competed at the double gun championships in Califorina last month and just to give you an idea my time on the 4 shot stage from an empty gun was 7.3 seconds.
The timer starts when you grab the rifle, expend the emptys reload fire twice eject, reload and fire twice more.
The .458 Lott makes a whole "LOTT" of sense in a bolt gun for many different reasons.
If you guys didn't know Rich is up in CO hunting elk right now so he's not here to defend his dearly beloved "redneck bigbore DG rifle".
I've seen him shoot that little devil and he's pretty darn handy with it.