A good reliable semi is fine in my opinion. To get a good reliable semi will cost you a lot more than a pump. The pump will work with a wider range of ammo, particularly light loads. Most autos will work most reliably with the standard to heavy loads.
If you don't mind spending the extra money and making sure they function reliably with the chosen ammo I see no reason not to trust an auto just as much as a pump.
If you don't mind spending the extra money and making sure they function reliably with the chosen ammo I see no reason not to trust an auto just as much as a pump.