The latter is the more popular because, without a decocker, the user is forced to lower the hammer by hand onto a loaded chamber, with all of the attendant safety risks that involves, in order to return the gun to double-action mode. Pre-travel is set for much less take-up than factory triggers. Some people said they did it longer than a few days. A small amount of energy applied to the trigger causes the release of much more energy. Only "double-action only" weapons are incapable of firing from a cocked hammer.