Is SA/DA really better than SA/SA?
Is DA/SA really better than SA/SA?
Whether or not you prefer double-action (DA), single-action (SA), or a combination of the two (DA/SA) will depend largely upon your level of experience, as well as what you are looking for in a pistol. But, before getting into comparison features, it is important to understand what these terms mean, especially for beginners.
Single-action and double-action
Originally applied to revolvers, the terms SA and DA refer to firing the gun with a cocked or down hammer. If the hammer is pulled back (cocked), the trigger action will be shorter and quicker, or single-action; if the hammer is down, the trigger pull will be longer and harder, as the hammer needs to pull back and then snap forwards again, making it double-action. As weapons technology has advanced, these terms can be applied to semi-automatic pistols as well.
A single-action only (SAO or SA/SA) pistol will always have a short trigger pull, such as the Smith & Wesson M & P or Colt 1911. A double-action only (DAO) pistol always has the longer trigger pull, such as revolvers with a covered hammer like the Ruger LCR. DAO pistols are required by some police departments like the New York Police Department because of this longer pull.
A double-action/single-action (DA/SA) pistol is usually semi-automatic and unsurprisingly refers to a mixture of both designs. The first trigger pull will be long and in the DA style, but all subsequent pulls will be SA for swifter follow-up shots.
Use in self-defence
When using revolvers, a DA/SA style is usually preferable, offering both fast and slow shooting capabilities. Some covered-hammer DAO revolvers can be beneficial for a quick draw, as there is no risk of the hammer snagging on the holster, but you will only get that harder pull that can make it more difficult to aim. SA/SA revolvers are a worse option because they do not have the DA’s swing-out cylinder, which allows for simultaneous ejection and loading of all 5-8 rounds. Instead, they have to be fed one round at a time through a loading gate, wasting time.
Semi-automatic pistols were originally all SA/SA. Examples like the Colt 1911 are enduring favourites and provide that clean action for quicker, more accurate shots. However, SA/SA pistols can be more dangerous to carry. If they are holstered without the safety engaged, you are essentially carrying around a cocked weapon. A DA/SA pistol’s longer first pull can help add an extra layer of security to prevent accidental discharge.
For beginners
The transition from a DA to SA trigger action can be disconcerting for many new shooters. Even though the heavier trigger action can hinder accuracy, DAO pistols are often used by police departments for the extra safety of a double-action trigger and because they allow for a more controlled rate of fire.
Ultimately, it depends on what you want from a firearm. SA/SA will provide swift, easy action, whereas a DA/SA or DAO weapon adds an extra layer of security when holstered. Whatever the case, remember that training is the most important factor.