The facts:
1. I own a nice old 2 9/16" chambered 16 bore
2. The gun I own is quality steel and is NOT damascus
3. I have zero desire to reload
4. Polywad and RST special order 2.5" shells are not always available.
The question:
How do I know a "safe" or "good" light 2.75" load that is appropriate for a 75-100 year old shotgun in good working order?
You don't and you won't.........I don't think a 16 ga 7/8 oz. load is out there.....?.......Except RST/PW........
If you have zero desire to reload, it is my opinion that you need to order your 2.5" ammo by the case and keep on hand RST or Polywad for that nice old gun.............or other 2.5" ammo.......
I would not advise 'Wally World" off the shelf ammo in that gun, of course, others here will disagree.......
The big ammunition factories change their loadings as they see fit to fill the market's need, so you never know what you are buying for that old gun
with consistency ..............
What's wrong with thinking ahead........?...........Planning ahead.........?...........Buying ahead.........?....