I've owned a 38/45 Clerke 1911 barrel for about 15 years, but never tried it. After seeing the Glock 38 Casull thread, I decided to dust off the Clerke barrel and fit it up to a slide. It didn't take long to figure out that the barrel had either been re-chambered deeper, or someone screwed up and pushed the reamer in too far since there was WAY too much headspace with a full length sized 38/45 case. Here's a pic of several different 9mm/45 rounds. Left to Right - 38/45 Clerke, My bastard barrel, 38 Casull, 9mm Super. After shooting it for a bit, I have come to the conclusion that an unsupported 1911 barrel isn't really the right platform for this round, so I ordered a 9mm Super reamer to rechamber a 6" Witness barrel. When it arrives, I'll post some load data for it. Tony Rumore Tromix P.S. The 9mm Super is a 40 Super case necked to 9mm. JGS makes the reamer.