Google moves links up based on the number of clicks.
Hopefully this will advance with time
https://docs.google.com/document/d/1y52UbLaVsDAYd3BJLNTzTnqa7CzuhnbgonQzuYRuLvs/edit
Plenty of information here, just for the looking, and I give my email on the Home Page

Turn-of-the-Century Shotshells, Powder, Proof & Ballistics
Barrel Evaluation, Non-Destructive Testing & Load Recommendations

Shotgun Research
Belgian Shotgun Identification, Barrel Makers & Marks
A.J. Aubrey / Meriden Fire Arms
Tobin Arms
H.& D. Folsom, Crescent & Tradename Guns

This is not hard to find
https://www.shotgunworld.com/forums/shotgun-id-value.5/

The Baker Collectors site is not a discussion forum, but Daryl and Chris graciously provide their emails also
https://docs.google.com/document/d/1PqK3UImDCrsOrk6O_2DsovHXvaNSzliSiwaP35Y6PMk/edits

As I said, if a vintage gun owner has no interest in researching his gun, that is his choice, as are the consequences of that choice.
You DO believe in personal responsibility, if not for ourselves, for our friends or children in approximation to us when we pull the trigger?

For instance
A post on the LCSCA Forum in Dec. 2014 regarding a 1906 No. 0 10g; barrel composition unknown by the gentleman:
I was at a farm where a guy I have known for a couple years came out with this L.C. smith. He first shot the gun with Federal Premium Vital-Shok 3 1/2 Inch Magnum copper-plated 1100 fps 27 pellets No. 1 buck (27 pellets of #1 buck is about 2 1/2 oz.). I still have the box and 1 live shell. He fired one shell out of each barrel with no problems. I asked if I could shoot the gun...and fired 1 shell out of each barrel.
I have never seen a gun this old nevertheless shoot one. I thought it would be cool to hunt with it. I'm guessing from your comment not such a good idea.

https://sites.google.com/a/damascusknowledge.com/www/home