A couple of options are out there for weighting scuds, with lead or non-lead wire being probably the easiest. I wouldn't use larger than .015 if I were to wrap a hook shank for a scud, with only about 5 or 6 wraps per size 14 hook, right in the middle of the shank. Another option is to tie the bead in the middle and tie the scud pattern around the bead.
Personally I don't weight my scud patterns since I don't like them riding upside down on the drift. I usually use a bead-head nymph to get my offering down to the fish and then trail an unweighted scud pattern behind that tied as a dropper off of the bend of the bead-head fly's hook. I like that scud to drift naturally just over the weeds as I impart a small amount of wiggle from time to time mimicking the natural scooting along the weeds.
Kelly.
Tight Lines,
Kelly.
"There will be days when the fishing is better than one's most optimistic forecast, others when it is far worse. Either is a gain over just staying home."
Roderick Haig-Brown, "Fisherman's Spring"