I have a 2" 12 BLNE that weighs 4# 15 oz, and although I have killed a few woodcock with it, I have not hunted with it enough to see an advantage over my 2 1/2" 20 bore. At least not yet.

So I cannot help you with that.

But whether it kills better or not, I still value it as an interesting example of the gunmakers craft from another era, one that will likely never come this way again.