67D how do you know what the choke of the barrel is?

To determine the choke of a shotgun barrel, you can measure it using a choke gauge or calipers. Choke constriction can also be identified visually by comparing the muzzle diameter to the bore diameter. Additionally, many manufacturers stamp or engrave the choke type on the barrel itself. If unsure, testing with different ammunition can help assess performance and suitability for specific shooting applications.