I am shooting 38 SW Spec and 357 wax bullets. I load them flush with the cartridge. Shooting them them in a SW 357. Loaded with CCI small pistol primers and Federal SPP. The primers back out when fired to jam the cylinder. I would estimate the primers back out 1/16 inch. I can tap on the cylinder and get the carrige open. No powder yet. Looking for an acceptable load down the line, Using my Chrony, FPS is 387 to 400 wth SD. Anyone with experience with wax bullets? Any help? Thanks.