I tried cast balls in the ROA and it don't seem to like 'em. A chap at one of my clubs bought one of those hand swaging machines and turns them out for £11 per 100 so not much more than the £8 per 100 I pay for cast - extremely consistent in weight they are too. Can't be arsed to cast my own. OTOH, my Uberti Remington shoots much better with cast balls. Go figure.