A couple of thoughts Dave Erickson,
I've learned over the years that a single triggered gun is better for waterfowl because
1) it's difficult to lace a cold or gloved finger into the right slot to pull the intended trigger and when you do manage to pull the trigger the heavy loads required for waterfowling can cause a cut or bruise from the trigger guard or back of the front trigger, and
2) ejectors are really important since every duck not killed immediately will only take a quick moment or two before swimming, running or diving - ejectors offer an empty and waiting chamber for some clean-up shots. Again, trying to dig a swollen shell out of a chamber with cold or gloved fingers can give you time to lose that canvasback you've always wanted.
