Stan, I know you are thinking of a 20 gauge and I am referring here to a 12 gauge but....
Last summer (so I'm on my second season with it) I had my Lovena sidelock with 28" barrels opened to .005 and .015. I think the 20 gauge equivalent may be around .004 and .013. Of course each gun and load is different so YMMV.
However, it has quickly become my absolute favorite for ruffed grouse, woodcock and the preserve birds I shoot (pheasant and chukar). While I haven't been hunting them for a few years I imagine I will love it when I get back to hunting huns, which are covey birds like quail.
I had toyed with something even more open (most of the rest of my guns, 12s and 16s, are choked in various combinations between .020 and .045) but just could not bring myself to do it. Now however, I am considering opening up one or two others.
