Have plans for a .38 Super Comp open gun and need some sound advice on handloads. I currently shoot steel challenges on a regular basis, so power factor has not been an issue. Once I step into USPSA, this will obviously change. What I need is some sound advice on load data, bullet selection, powder choices, pressure dangers, etc. The gun will be an STI or some variant thereof. Also, is it necessary to install an Aftec extractor for reliable case extraction when running .38SC? I have an order of 1k Montana Gold 124gr JHP projectiles on the way, and was going to load them. Dies are Dillon. Thanks gurus!