I have shot 2 with TSS. One with a 20 gauge 3 in mag at about 35 yrds or so. But that was with this choke combo that is supposed to be the ticket for an 870.

The second I shot with a 3.5 in mag 12 TSS load at about the same distance. Less pellets on target than the 20 for some reason, but, knocked it down with authority.