One thing to be aware of is chrome plating extending part way into both ends of the barrel or possibly through it. That reduces the bore and groove diameters raising pressure. If it's there I would measure the bore by slugging it before deciding whether to fire regular cartridges.

I own a chrome plated but other wise original and functional U.S. 1917 .30-06. My guess is it was most likely plated by a veterans' organization but were any 1917s chromed by the military?