The limited training I've had with the defensive shotgun has emphasized it's role as a "surgical" weapon. In my case, I was shooting a 14"x14" paper with 2 3/4" 00 Buck. At 8 yards (25 ft), the group was 5.75" with one pellet off paper; at 17 yards (50 ft)the group was 13" with two pellets off paper.
The group sizes aren't terrible, but the fliers cause me some concern. I believe the 870 can be tuned to get the entire group within head size at 15-20 yards.
The fore end light provided by Scattergun is a SureFire.
[This message has been edited by Rich Lucibella (edited 01-14-99).]