[irishc]

30 is ok. Like others said, tie a longer top shot and the braid won't get nicked as easily. You can even use 40 lb mono for the top shot and believe it or not, when you get snaged if your knot is good and the braid is in good shape the mono top shot will usually break first, even though it is a heavier lb test. Also, something to consider... what usually gets hung up is the sinker, not the hook. That said, attach your sinker to the top shot using a lighter mono like 10-15 lb and you won't have to retie as many rigs.