One significant advantage that doubles have over single-barrel repeating shotguns is the ability to have more than one choke at a time. Some shotgun shooting sports, such as skeet shooting, use crossing targets presented in a narrow range of distance, and only require one level of choke. Other sports, like sporting clays, give the shooter targets at differing ranges, and targets that might approach or recede from the shooter, and so must be engaged at differing ranges. Having two barrels lets the shooter use a more open choke for near targets, and a tighter choke for distant targets, providing the optimal shot pattern for each distance.
One significant advantage that doubles have over single-barrel repeating shotguns is the ability to have more than one choke at a time. Some shotgun shooting sports such as skeet shooting, use crossing targets presented in a narrow range of distance, and only require one level of choke Other sports, like sporting clays, give the shooter targets at differing ranges, and targets that might approach or recede from the shooter and so must be engaged at differing ranges. Having two barrels lets the shooter use a more open choke for near targets, and a tighter choke for distant targets, providing the optimal shot pattern for each distance.