I just bought a used 5 shot .45 colt. It is a Ruger Blackhawk stainless 4 5/8 in. and is fitted with a belt mountain base pin and Phillips and Rogers 5 shot cylinder. I was wondering if anyone on this board had any load data suggestions for me. I would like to stick with H110 and a 300 grain cast bullet. If anyone could suggest min. and maximum grains of H110 with a 300 grain cast I would be grateful. I do plan on doing my own experimenting just thought I would get your opinions also. Thanks.