They didn't do that thinking of hot SAAMI spec loads in 1913, or, thinking the gun would be in service, with those loads, 98 seasons later.
Not end of story. The guy is asking a legit question. He will have to appraise the condition of that wood himself, but, short answer, I wouldn't do it if it were my gun. I've got others that are better qualified to ride in the bottom of a duckboat.
A hundred year old gun, with current spec ammunition, isn't the best choice for ducky gun duty.

Best,
Ted