I tried many loads, many years in many guns. My new SBE II 3.5" is simply the best patterning and shooting shotgun that I have ever seen, at least that I have shot. The SBEII is really kind to the shoulder, and the pattern as you can see is simply lethal. I have taken several spring and fall birds with it....and while my old 870 Remington took many turkeys with Hevi Shot #5s, it was the 3.5" Hevi 13 loads that made me stop and see if I could repeat the pattern each time....I could.
I use the Hevi 13 Choke tube.
Here is an example of Hevi 13 with my favorite - Hevi #7s....
Doubt I ever switch....but if I did, it would be to Hevi-Shot Blend which almost patterns as well as #7s.