Been trying to dial in my Remington Express with factory 26" barrel that I got a few weeks ago. After getting the POI changed by my gunsmith with a bit of bending of the barrel its pretty close now. Anyway, I had several different loads to try with a few different chokes. The Chokes were a Comp-n-choke XX, Remington factory Superfull (572), Sumtoy chokes, 562 and 567. Loads on hand and tried were Heavyweight 6's, Longbeard 6's, Old Remington hevi-shot 5's and 6s and Heavyweight 7's (only shot a couple of those because I'm hoarding them) and some 3rd degree shells I bought at Walmart with TSS size 7's included.
Testing was done at 40 yards checked with a laser range finder and all groups were shot off a lead sled in about 5 MPH winds at 62 degrees. Barrel was not cleaned as I forgot my bore snake.
Clear winner was the Winchester LB in size 6 with the Remington Superfull turkey choke. 148" hits in a 10" circle at 40 yards. Second place was my Sumtoy .562 and Federal Heavyweight with 132 hits in the 10" circle at 40 yards. Either combo was a real dead turkey at probably 45 yards.
I'm done as that's good enough for my backup gun.
FWIW, the Federal Heavyweights in size 6 weren't good for at all. Averaged about 80 hits. The 3rd degree shot worse then any other shell, but I only tried it with 2 chokes tubes (my two Sumtoy's).
I was very impressed with the Long Beard. I've heard it is good, but didn't realize it was that good.
Picture of the winner.