i put a lightweight Majestic Arms barrel on my wife's purple thumbhole 10/22; at first it had a spiral fluted Shaw bull, but that one was too heavy.
we went with the new alum shrouded tube on it & shaved 1.5# off the weight, and but is still a .920 bull to fit the stock inletting for straight bulls.
Butler Creek, TacSol, Majestic, and a few others have made lightweight .920 bulls that don't add poundage.
would she be opposed to an autoloader if it made the weight she was after?