Why are 'Full' and 'Modified' common chokes used?

'Full' and 'Modified' chokes are designed to constrict the shot as it exits the shotgun barrel, which directly affects the spread of the shot pattern over distance. The primary purpose of using these chokes is to improve accuracy at varying distances by controlling how wide or narrow the spread of the shot will be.

A full choke provides a tighter shot pattern, making it ideal for shooting at longer ranges, where precision is crucial in hitting the target. On the other hand, a modified choke offers a slightly wider pattern, allowing for increased accuracy at medium ranges. This versatility in shot pattern makes both the full and modified chokes valuable tools for hunters who may encounter different shooting situations.

The other choices do not directly relate to the primary function of chokes in shotguns. While cleaning and aesthetics are considerations for firearm maintenance and appeal, they do not affect shooting accuracy. Similarly, the cost of chokes isn't a primary factor in their effectiveness or application in improving shot accuracy.