Which of the following is a key feature of target rifles in comparison to hunting rifles?

In the context of target rifles compared to hunting rifles, a shorter trigger pull is indeed a key feature. Target rifles are designed for precision shooting, where the shooter must have excellent control and minimal disturbance during the shot release. A shorter trigger pull facilitates this, allowing for a more consistent and accurate firing process, as it reduces the amount of movement needed to fire the rifle.

In contrast, while longer barrel length, heavier overall weight, and more complex sighting systems can also be features of target rifles, these are not as universally defining when comparing them to hunting rifles. Hunting rifles may indeed have lighter triggers, but the sensitivity and poise of response in the trigger mechanism are particularly emphasized in target shooting to ensure accuracy with minimal input variation. Thus, the characteristic of having a shorter trigger pull in target rifles is central to their design and purpose in achieving precision in shooting sports.