I have a 7mm Rem Mag and 264 Win Mag, both 1980's era guns with walnut stock in the ~9.5-10lb range with 20oz Vortex LHT scopes. They don't feel "heavy" to me, but I have not gone hunting out west. I will if I get the chance. I am not putting any effort into lightening them up, if I want something lighter I'll find a short action cartridge that I can chop some barrel off and add a silencer. These older guns are not threaded. The 7RM is a 26" light contour without enough meat to thread and the 264WM is a Winchester M70 push feed with the front iron sight. MAYBE I'll look into threading the 264 and setting back the front sight, but I know 100% I'll never use the iron sights, so its just wasting money to keep that somewhat desirable part of the gun intact.
My brother has a Sako A7 300WM with synthetic stock and it is brutal on the bench. I have not gotten better than 2MOA with it because it jumps around so much. I have not weighed it, but it would very likely meet the <8lb mark. No break on that, but it needs one.