I would use what patterns the best.
That's the secret, and always has been. I've been experimenting with turkey guns and chokes for over 25 years, looking for that "perfect" combination. I've got a bunch of half boxes of all different brands of shells I've tried. Don't be fooled into thinking that you have to use expensive shells or some magic formula shot, because you don't. Plain old lead will do just as good a job.....providing you do yours. It's no different than deer hunting, as people have been killing deer for years with the old tried and true cartridges every bit as good as they have with the new ones.
As I said, I've experimented quite a bit with different shells.......Federal, Remington, Winchester, and Heavyweight. Long ago, I settled on Winchester Supreme's, and lately have started using the Longbeard's. I just killed a bird this past week with a 20 gauge Longbeard #5 at 48 yards, a much longer shot than I like to take with any shotgun. But, I'd patterned it and knew what it would do. Again, that's the key......pattern your gun with different shells, and different chokes. Also, don't be ashamed to shoot plain old lead, because I'll tell you a little secret.......it will kill them just as dead as shot costing 5 times more.
Having said all that, suit yourself and use whatever trips your trigger. Over the years, I've quit overthinking the turkey hunting game, and have quit guying new calls and decoys, and every other kind of gadget that comes on the market. You don't need all that to kill a turkey. What you need is patience and persistence. Everything else is just to spend money on needlessly.
