This is my 870 SPS, I really like the gun quite a bit. I'm currently shooting Hevi 13's 3.5"/2.25oz/#6's out of it using a Indian Creek .665 choke, and have a Mueller 2-7x33 with the illuminated reticle on it. So far I really like it.
I wasn't able to pattern the gun out to 40 yards before season started with this specific load/choke combo, however at 20 yards this comboput only 28 pellets
outside a 10" circle. According to folks on the NWTF board this load has approx 445 pellets in it, which means it put 400+ in that 10" circle. My best guess is that at 40 yards it would probably be putting 180-220 pellets in a 10" circle which is plenty tight for me. The 25lb tom I shot last weekend dropped like a sack of potatoes at 42 yards and didn't even flop.
And a picture of my first bird with this gun.........[8D]