1 original 700 trigger from a classic, 35 shipped. off a 90's vintage rifle, not new replacement trigger. 1 timney tactical adjustable trigger 125 shipped. SPF
Definitely sear engagement. Here's how to check, take a small screwdriver, lift and lower the sear manually with the bolt removed. Brake cleaner works very well to remove gummed up oil and varnish.
The sear should pop up under spring pressure, thoroughly cleaning the area and NOT using oil is key in this area.
I clean my trigger/firing assembly at least twice a year and always after a wet hunt or dusty hunt. It only takes a small bit of crud to hang up the most important piece on a firearm. Keep it clean of dust & oil.