I was wanting to test a few coyote shells/choke combinations yesterday and I decided to carry a few of my crow shells as well. I thought I would post my results here for those interested, as I have read every shell/choke thread here. These aren't 3 or 5 shot averages, just a mere comparision between one shot of each shell I have been using for crows lately. I shot these off of my sand bags, both shown the pattern to be slighty left, but there was a steady crosswind. My usual choke selection for crow is Improved Cylinder in the bottom barrel, Modified in the top. The shots below are from the modified barrel at 50yds. I would venture to say that I run out of energy before I run out of pattern with the 7 1/2's.
My set-up: Browning Citori w/28" barrels Carlson's Extended Modified Choke