The gun is a mid-1960s Pedro Gorosabel 16 ga., proofed at 850 kg/cm sq.

The questions are simple (but the answers may not be):

1) Can I shoot North American factory loads without a care?
2) Can I reload at 10,400 psi (published, Lyman's 5th) without a care?

I ask because 2 hours of internet reading still leave with me with information ranging from "shoot with confidence" to "Wait, stop!!!"

Thank you in advance, gentlemen.