I got out of the 16-gauge low-pressure reloading altogether. I belonged to the 16 gauge group and found the data immense but mostly unusable. The load I ended up with used Herco powder and seemed ineffective for pheasants. It may have worked for grouse and woodcock, but my gun was choked full and fuller. My 20s will handle anything. My remaining low-pressure gun is a short-chambered 12-gauge, and I have a good load that's easy. Hodgedons Clays.