A shotgun’s payload of pellets flies downrange in an expanding, lengthening swarm. The choke in the gun’s muzzle determines the height and width of that swarm. “Choke” is the taper in the last inches ...

Confound it the frustrations associated with automatic chokes. They either don't choke enough and the darned thing stalls when it's cold or they choke too much and it is fouled spark plugs and sooty ...