Best pattern with my shotgun - Winchester Long Beard XR 12 Gauge 1-3/4oz 3'' Shotgun Ammunition

After testing several different turkey loads, these shells with #6 shot deliver the best pattern with my 870 and an Undertaker choke tube. Dropped a gobbler at 40 yards. The pattern is fairly even and dense at 40 yards. I did notice that a few of the shells rattled when shaken despite the shot supposedly “locked” in the buffer material. Not sure if that affects performance.