"Back in the day" When I hunted with my wifes uncle,it was all about the 12 ga. Usually the 870 or Ithaca 37. I was young and hung up on the "More is better" train of thought. He used a little Spanish 20ga side by side. Now, I'm 26 or 27 years older and a bit wiser. I recently purchased a 20ga 870 to be used on bunnies,but I can appreciate the virtues of the over/under also. I used a Browning Citori Trap Plus for a few years trap shooting, and have a soft spot in my heart for the stacked double. When I hung up the game I was AA with a 23 yd handicap. Yep, the over/under may be my ultimate bunny thumper. 20 ga preferably. The low center of gravity. The choice of chokes. The short overall length even with fairly long pipes. Hmmm, might have to start saving my change.