I have been shooting competition rifles for decades now. My M1a, which I earned my Distinguished, had a lower weight limit of 4.5 pounds. That was primarily due to the mechanism. A lighter trigger will cause the hammer to over ride the sear.
When I switched over to bolt rifles, I found that a trigger less than 1.5 pounds, I would trip the thing during sitting rapid or prone rapid fire. Moving the trigger finger off the bolt handle into the trigger guard, under time, and occasionally I would not feel the trigger and boom!
I am now shooting Small Bore Prone and using triggers from 8 ounces to 1 ounce. The one ounce trigger is a set trigger. One ounce is just at the edge of my sensitivity. My finger can hover over the eight ounce trigger, but the one ounce trigger, I don't dare touch it till I am ready to shoot.