I have one that I just set up this season. It has a 26" barrel.
I am running an Indian Creek 665 with Winchester LongBeard 5's in the 3-1/2" 2 ounce load and 1-3/4 ounce load of TSS. I also shot mag blends and they did well. If I did anything different next year, I'd try a SumToy 675.