Thanks for the info on the sabots. Much appreciated.
I have my 870 set up with a peep sight but also purchased a cantilever barrel that has a 2x7 scope. The peep sight barrel will hold a 2 1/2" group from the bench at 100 yards with the Accutips but the cantilever barrel didn't seem to like those or the Hornady SST.
I'll definitely give the Federal rounds a try.