My iron sighted Target Rifle is around 4#.
I have a scoped Win. M70, which has the factory trigger on it set to the lowest safe pull weight (at a guess, sorta 2.5#-ish). Believe it or not, the factory trigger is plenty good at this pull weight or heavier (it can't be safely set to a much lower pull weight, so if you need or think you need a lighter trigger, you need to use an aftermarket trigger)
I have a couple of Savage 110s (one a plain Jane .30-06 hunting rifle, the other a .22-250 varmint rifle). Both have the older adjustable "non-Accutrigger" triggers. I have them set to about 2# pull weight and have reduced the sear engagement to make them crisp. At this sear engagement it is not possible for the safety to operate reliably, so I have disabled the safety (don't chamber a round until ready to shoot).
I have an Anschutz .22 match rifle. I used to have the trigger on it set as light as possible (perhaps 2 oz.?). More recently I have set it as heavy as possible, in order to be more like my fullbore rifles, but until/unless I change the springs in it "as heavy as possible" isn't very heavy at all, perhaps 6oz or so.