All I can say is, try them inyour 870. They shoot great out of my Nova 12ga and my 13yo son's 870 20ga. He took a doe with one4 weeks ago. One shot, one kill. Here I can get the SST's for about $2 less per pack than most of the other sabots.
I shot them and they were all over the place two ,, coudnt get them to GROUP worth a crap,, I tried this slug called LIGHTFEILD and i was puting holes on top of holes with these slugs .... just my 2 cents......