I will have better look at the model 20 and post some pics if I can.
I hate to say it but it almost looked torched which is not something we normally see here.

Away for a few days now but briefly when the lead shot ban came in about 10 years ago it was decided the 20 bore could not carry a humane payload in steel so was exempt from the ban.
16 bore is hardly ever seen here so its also exempt.
Most duck shooters here use 3- 3 1/2 inch 12 gauge semi autos, I doubt one in 50 would use an older gun in 20 or 16 bore so I guess they don't see it as a problem.
Good for the likes of me however.
There is always the possibility some greenie might jump up and down and get it reviewed but for the foreseeable future it stays.
Ironically its legal to use gaugeadapters and shoot sub bore in a 12 gauge gun provided you have no lead 12 bore ammo on you,go figure!


GDU