Great info guys. For the last bunch of years I've been running my 870 wingmaster with 28" tube. It'll only take 2 3/4s but patterns #5s really well at 40 yds with the full choke. The downside is that the finish is real glossy and am convinced the shine has cost me a couple of real dandys. Love the gun, but these NY easterns are spooky enough without me giving them more advantage.
