For a 12 gauge, a dime won't (usually) go in a full choke. On my Winchester 1897, a dime goes to FDR's mouth; the gun is marked full. My BRNO SLE double is choked IC/MOD; a dime is a tight fit in the MOD barrel, and slides easily down the I/C barrel. The old dime trick is one I've used often, but unfortunately it only works on 12 gauge guns. The smaller bores require a dedicated choke gauge.
As a slight aside, I didn't know Norinco ever made a 97 copy with a longer barrel. All I've seen are riot guns. There is a Norinco ATD in my collection. And while it isn't the quality of a Browning, it serves me well.
Mac