I dunno, Bob - you can crank down pretty hard on that big back spring! Might be able to pick up a pound and a half, or even two pounds!
Gary, there are really very few "dumb questions" posted here. I was always told that the only dumb questions asked, were those NOT asked! And your question, as you can see by the responses, is truly NOT a dumb question.
Triggers are really vital to us - they set in motion that complex reaction that (usually) results in a piece of lead hitting one's target. Just think of history if the cave man had had that possibility!
Study the mechanism of your double-set double trigger while it is out of the rifle. That rear trigger has a fairly stout spring held in by a screw on top of the trigger bar. But when you pull the back trigger, the trigger bar goes DOWN, not up to the sear bar! And the front trigger has a very light spring, many times just a thin piece of piano wire.
Now, when you "pull" the front trigger, you barely move it - certainly not moving it enough to reach the sear, much less move it enough to make the sear release the tumbler. BUT, it does move the few thousandths of an inch to release that Lord-amighty-stout rear spring, causing that rear trigger bar to go flying up fast and hard to smite the sear a whopping hard blow - which releases the sear nose from the tumbler, causing the big main lock spring to rotate the tumbler, which allows the cock to spin forward, hitting the frizzen hard enough to both dislodge it AND creating a shower of sparks, igniting the powder in the pan, causing enough radiant heat to ignite the powder in the breech, resulting in many foot-pounds of force to hit the back of the ball, causing said ball to start forward, out of the barrel, across a big canyon fast enough to smite the mountain goat hard enough to pass right through that goat, which in turn, eventually winds up on your dinner plate! And all because that front trigger moved just 0,001" (+/-)!
Ain't we lucky to expend so little energy to get dinner, instead of trying to hit the goat with a rock?
So, you see that you have to work with BOTH springs and BOTH triggers, allowing them to work together to let your rifle "fire" with a comfortable-to-you feel.
Need me another cream soda after that discourse!