The Sig Sauer P225 A1, like many other Sig models, is a traditional double-action/single action semi-automatic pistol. That means that the first trigger press does two things: cocks the hammer and then releases it, thereby firing the gun. The semi-automatic action of the first shot not only ejects the spent cartridge case and loads a new one, but it also cocks the hammer for you for subsequent shots. What all this means to the shooter is that the first trigger press requires significantly more force (about 9 ½ pounds, on my test gun) than following presses, which only require about 4 pounds of pressure. Many shooters, myself included, like this feature for a defensive handgun, because it requires you to be deliberate about firing that first shot. Of course, using a traditional double-action requires more training to master that change in the trigger feel between the first and second shots. It’s very much a personal preference decision: some people love double-action pistols, and other hate them. I love them, but that’s just me.