The 'Old Timers' used to consider a 9-10# sporting rifle light..........
but I admit Im not the man I used to be. My old Stevens Mdl 44 action rifles and Win. Low Wall 25-20 ran 7#, and many of the H&Rs do about that. They were considered ideal woods loafing rifles.
I do remember reading some sporting magazine articles from 100 yrs ago where some 'elderly' chaps extolled the virtues of super lightweight; ie, 5ish#, but a definite minority and harder to shoot well offhand ("standing on yer hind legs and shootin' like a man", IIRC, attributed to H. Pope)