My son's Ruger has functioned flawlessly with 185 grain to 230 grain flat nose and round nose jacketed bullets as well as cast lead SWC. So far it's never met a bullet it didn't like. My wife's Sigsauer C3 also feeds 185 to 230 grain flat and round nose jacketed with no problem but will not feed lead SWC. My brother's Kimber's slide will not move back when my 185 grain loads are fired but will feed if the slide is manually operated but the 230 Winchester white box works fine, I haven't tried the SWC. I'm not headed any where with this, just thought somebody might like to know.