Ted, I can't measure the spread of your patterns from the pictures. My preference in grouse and woodcock guns, especially early season, is little or no choke in the open barrel. The tight one isn't as important on an early season gun because, as you observed, you don't get that many second barrel shots. I currently have a Francotte 16 that measures .002 R and .016 L, or not much more than cyl and mod. If I shot it better and if I didn't have a 28ga Parker Repro choked Q 1 & 2, it'd be a good grouse gun.
But just eyeballing your patterns, I'd bet that a 30" circle would cover 100% of both. The 2nd pattern, maybe a 20" circle.
If your choke were either cyl or skeet, you'd have quite a few hits outside the 30" circle. Cyl should give you about a 70% pattern at 25 yards; skeet, a little more than 80%. IC, at a bit less than 90%, will have some hits outside as well. Mod will put the entire pattern inside the circle at 25 yards, as (obviously) will full. Again only eyeballing, but I'd say that's what you have in that Darne.
With most woodcock shots coming well under 25 yards early in the season, I don't think I'd want to hit a doodle with even your open pattern. If I were to shoot a gun choked that tight for the game you're playing and didn't want to use spreaders, I'd go with very light loads--7/8 or even 3/4 oz--of 7 1/2's. Probably won't give you more spread, but will give you less density.
