"...Lead SWC..." Your barrel chamfered to use SWC's?
Um, this is the first I've heard of this. Did you mean chambered, or chamfered? I just loaded 20 rounds of 175gr LSWC in .40S&W, is there something I should know?
edit: do you mean just for lead, or any type of SWC? 'cause I shot some handloaded jacketed SWC in my 1911 the other day, worked great...