No matter what the potential laboratory accuracy of a firearm, it does not matter if a human shooter cannot fire it accurately under a set of real-world conditions. A firearm that is comfortable, fits the user well, and provides for a careful, consistent trigger pull and recoil management is not only a physical advantage over a poorly fit firearm, but a psychological one as well. Trigger The dynamics of the trigger are one of the most important aspects of usability, since any movement of the firearm caused by pulling the trigger can affect the placement of the shot. Trigger pulls are relative, however. Compare a sport like action shooting, which emphasizes speed and uses relatively close targets with large scoring zones on the targets, to bullseye shooting, which uses distant targets with tiny scoring zones. While both types of trigger need a predictable pull, bullseye shooters demand a much higher degree of precision. Analysis of the trigger pull The trigger pull consists of three stages: Takeup or pretravel, which is the movement of the trigger which happens before the sear moves. Break, the movement during which the trigger moves the sear to the point of release. Overtravel, which is the distance a trigger moves after the sear releases. The takeup is the least critical stage of the trigger pull, and individual preferences vary widely. Two-stage triggers, for example, consist of a noticeable takeup, followed by a distinct increase in the force required to pull the trigger, followed by the break. A single-stage trigger, on the other hand, has no discernible movement before the break. Fully adjustable triggers will provide a two-stage pull, and the option of reducing the first stage travel to zero, essentially making the trigger a single-stage trigger. The break is a far more critical stage of the pull, as it happens just prior to the shot being fired. Here again, individual preferences vary; some shooters prefer a soft break, where there is a smooth but discernible amount of trigger travel during firing, while others prefer a crisp break, with a heavier weight and little or no discernible movement. The overtravel can be the most critical factor in the trigger pull, as any movement caused at this point will happen as the shot is fired. This is especially important with firearms where there is a sudden release of resistance when the sear breaks, such as in double-action triggers.