RE: thompson center 54.cal hawken
After you load the Hawkins, you can cock the hammer. Then pull the back trigger first. This makes the front trigger or main trigger into a hair trigger. You do not have to use the set trigger. You can fire the rifle off just fine using the front trigger only, just the that the pounds of pullon the trigger is greater without the set trigger engaged. With the rifle empty practice releasing the hammer with the set trigger on. You will need to learn that when hunting.
To cock the rifle without the noise of the hammer locking back, you can hold the front trigger back while at the same time cocking the hammer past all the locking points. Then. with the hammer all the way back, release the trigger. Slowly let the hammer come forward, and it will stop in the locked or cocked position. You can then set the back trigger and make the front trigger a hair trigger. Again, something to practice.