Remember, there are # of things that effect your conception of a trigger pull.
One is the travel of the trigger before it reaches the release point, thats called creep.
Second is the actual pressure measured in lbs and ounces to release the trigger itself.
The third is the over travel the trigger moves to be able to reset itself.
Ive been shooting a 1911 for years and years in both target and action shooting and I have found out that the actual pressure required to release the hammer made no difference in accuracy in my SpringField 1911.
What did make a difference was a Wilson trigger that has an overtravel adjustment screw, that eliminated the trigger travel after the break.
At the same time I had a "trigger job" done to reduce the creep to nothing and the "pull" needed down to about 2 lbs.
Did all this increase my accuracy?
Yes and No. Depending on what I was doing.
If I was competing in Bullseye? The light trigger, lack of creep helped my scores from the one handed/shakey stance they require.
I then started competing in action shooting and found the light trigger hampered me because I found myself applying light trigger pressure before the target was centered in my sights,sending the round off before I was really ready.
So now Im back to the 4-5 lb trigger pull and still have no creep and a fast reset.
So, I suggest? If your looking at a "trigger job", look to have a clean crisp trigger and not concern your self about the actual pressure it takes to release the hammer. If all your fundamentals are correct, a light trigger is not going to make you a better shooter.
Hope all this helps.