I cast out 148gr. Double Ended WC with a RCBS mould, using straight wheel weight lead. I lube them with Jakes Red, and charge them up to around 800fps. It has been good to me with my .38's+.357's. I size them to .359" and do not get a leading problem.
If you were to buy hard cast, Missouri Bullet Co. is excellent also. Brad, and his people at MBC are GREAT people to deal with+ULTRA fast shipping. Just my 's worth..Bill.