Is my Parker safe to shoot 2 3/4 12 gauge shells?

[stumpstalker]

Adam:

Both you and your 12-year old son should join. I can only imagine the outdoors-related technical, social, and cultural riches I could have enjoyed with my father, when he was buying a few Parker guns back in the late 1950s-early 1970s, had there then been a PGCA.

If I am reading the serial number correctly (131572), the PGCA has factory records on your gun, which would enable our Research Chairman to issue a letter on it.

The fee for such letters is discounted for dues-paying Members to $40 per letter.

[Adam Auksztulewicz]

Yes! 131572 is the correct serial # located on two spots of my Parker. What do the factory records offer? I'm just worried that the modified stamps were done outside the factory. Is that a possibility? How much is the yearly membership versus lifetime? Thank you,
Adam