I'm still in the developmental stage on finding my maximum effective shot size and choke combo. But so far Winchester Long Beard XR 5, 6, and 4 shot have all patterned very well out of my 12ga 3.5" 870 super mag with a 24" barrel to 45 yards. I have chokes from Carelson .660, Indian Creek .665, Remington #1-Xtra full at .688 and Remington #2-super full at .676.
This is a picture of 1.75oz copper plated #6 Winchester LB/XR at 1200fps/MV at 40 yards pic states 45 but that was a mistake on my part. Keep in mind this is out of a 3" 22.5" barrel 870 my son uses. Pattern is a little low, but IMHO VERY impressive. Choke is an .665 Indian Creek BDS.
#4 shot just as good so I'm going to the range tomorrow to hopefully finalize my choke/shot size combo for this gun.
The patterns at 40 out of my 3.5" 870 Super Mag are even more impressive with 2oz of shot. Going to give 2.25oz of #4's with a less constricting choke to see what happens.
We are free to shoot what ever we wish, but for the cost of pennies over $2 a shot you just can not beat Winchester LB/XR. In the right choke/shot size combination they are stone dead lethal at 60 yards.
I agree 100% and have learned that every shotgun shoots and patterns different shot sizes differently. My friend and I both bought 870 Super Mags on the same day same store serial #s were so close guns were almost certainly from the same batch run, but they both couldn't shoot more differently. His has shot more or less to POA mine needed A/M sights to have any hope of hitting and killing a tom past 40 yards.
That's why patterning your turkey gun is of absolute importance. Sadly due to work I was unable to go turkey hunting this year with my friends to one of our favorite public land spots. My friends brother doesn't believe in patterning his turkey gun says it's market hype/B.S. meant to get you to spend money. They had a very hard week of turkey hunting due to very cold and crappy weather. Finally on the only decent partly sunny morning his brother managed to call in a lone Tom for him to his decoys off the roost. Missed a easy 35 yard shot. Only took one shot at a IGA paper grocery bag used as an improvised turkey target at 35 yards to see his A/M F/O sights that attached to his vent rib had either somehow dramatically shifted POI to the left, or the load he was shooting was hitting far left. Regardless cost him a fine Tom.