I have used O/Us some and have an O/U Win Supreme Field in 12 ga and a newly purchased sxs 20 gauge . When the first Nitros from Nitro Ray came out I know that some hunters had that in the pump or auto but if it got really close they had to shuck out the nitro if they chose not to shoot it at the expense of spooking the turkey.
The debate as to having a close up choke beside a long shot choke, lead vs. HTL. #4s x #6s, you name it are all debatable .
I know of one guy who did a lot of testing and reasoning and he now has the same choke in both barrels and is satisfied with a choke open enough to be effective at close range and yet get around 120-130 shot in the 10 at 40 yds. That being the case you may be better off with the pump or semi-auto by having extra shell capability and they are not as expensive as O/Us in general. The less thinking and concentration you have to do outside of keeping your eyes focused on that turkey and not the mosquito on your nose the better.
