I do have to say, with the lighter weight rifle, I found the balance to be different than my wood stocked M77 which wasn't necessarily bad, just different. For comparison my Browning Pump Shotgun is 7 pounds 10 oz. and I carry that all day in my hands.
I'm not sure at what point weight savings results in less balance and stability shooting freehand , but I do feel like I can "jump shoot" better with a gun that has it's center of mass
closer to the pistol grip butt portion between the hands on the rifle or shotgun. I do think the lighter stocks are a little light in the rear end. Kinda like a pickup with the bed off. I do remember feeling like the 50 mm scope on the Ridgeline made the rifle a little top heavy balance wise. That would be my concern with any light weight rifle, but I think I'd eventually get used to it. FWIW I've been packing an 8 lb 5-12 oz rifle for 30 plus years so that's all I know.
i found it interesting that Chuck Hawkes wrote an opinion that a rifle chambered for a magnum cartridge should be 8.5-9 pounds. He did not mention whether a muzzle break could reduce that...