I have a 1776-1976 commemorative Featherlight 12g., 30" mod barrel, very thin barrel (I guess to lighten it up). Does anyone know if it can handle modern high pressure 2 3/4" loads? I have many cases of a brand called Clays that I had tested and it comes in at an average of 11,500 psi. I shoot it through my 687 and will probably shoot it through my BSS from the 1980's but I am not sure about the M37. I also have a Winchester 101. Would it handle it also?
Thought or comments appreciated?

So many guns, so little time!