I just got a Patternmaster choke tube for my 870, and I will NEVER go back to shooting anything else. Using that tube, I absolutely HAMMERED the ducks like never before - only one I hit kept flying, and I have a feeling I just grazed him. I thought I was going to have to start buying the expensive shot shells to kill birds, but the Patternmaster groups so tight, that I just don't think I need to anymore. One word or warning, though - if you hit them too close, you will lose some meat! Steel finally kills like it should now that I have this choke. Get one - it is worth the $85.
Loki :salude: