. . . . if yal are really worried about a follow up shot with no jams carry and over and under or old school double barrel.
Ha!
Many years ago, before "choke" tubes became popular, I set up my then "perfect" turkey hunting shotgun. It was a nice, very lightweight Spanish-made side-by-side 12 ga bored full & extra full.
But like most older side-by-sides, it had two triggers.
First time I needed a 2nd shot, I pulled the same trigger, pulled harder, and it still didn't shoot
Nothing is 100% reliable.
Side-by-sides "doubled" the immediate shooting capabilities of the original single shot. O/U's just a different version. Just my opinion, but over/unders have always been an over-priced "fad".
For
general hunting & self-defense, pump-actions & autoloaders made these 2-shot guns more or less obsolete, much like the 2-shot guns made the 1-shot guns less desirable. But,
specifically for turkeys, having only 1 or 2 shots is not much handicap.
Having said that, for most of my turkey hunting life, I carried that lightweight side-by-side 12 gauge, until I replaced it with a couple autoloaders (one in 12, one in 20). Also did a little turkey hunting with a 20ga O/U, which is now just a safe queen.
As we get older, our eyes take longer to re-focus from close to far, from far to close, meaning it's often you can't clearly see your sights, or can't clearly see your target, at the time of trigger pull. Optics allow for both close & far to be seen more clearly. I "need" at least something like a Burris Fastfire on all my hunting guns, prefer a traditional low-magnification scope on turkey guns (which is not as practical to mount on an o/u or sxs).
One more thing, most o/u's & sxs's will not have the same poi with both barrels, and unless you have adjustable sights (on any shotgun), you're using "Kentucky windage/elevation" to attempt accurately shooting those tight chokes.