Hoping someone more knowledgable will confirm this but from what Ive read theres a minimum safe weight for the m14. Dont take my word for it Im a Gunnewb. This guys a much respected m14 cat.
"What is the weight of the trigger pull? Measure it carefully …4 and 1/2 lbs is the absolute MINIMUM safe weight. If it is less than 4 ½ lbs, then the hammer may follow in some circumstances. … especially if the rifle is not held tightly against the shoulder. This is called BUMP firing."
From-
http://ebrsopmods.proboards.com/index.cgi?board=polytechnorincom14&action=display&thread=2652
I didnt measure mine but had read stuff like this and knew it was lower than 4.5