Redding Profile Crimp die may be in order as well. My standard 357 Magnum load uses 13.5 grs 2400 and either Lyman 358156GC (161 gr) or 358477 (155 gr). If you have plenty of 38 Special cases, 11.0 grs/2400 and cast 158 gr SWC is an excellent “38-44” load, very accurate and will be “kinder” to your Model 19.