Hi. I live in th UK and have made chamber adapters for military rifles including ones for the .303 Lee Enfield to shoot .32 S&W long. I've had great success. I recently tried a cast 120gr bullet at .314 with 2.1 gr of Red Dot. I found extraction difficult and some split cases.I was surprised as this wasn't a heavy load. I wondered if .314 was too oversize so I resized them to .311. These with the same load showed reduced pressure. I'd understood that an oversized cast bullet of several thou. shouldn't give excess pressure. What does anyone think? The lee enfields are known for having oversized bores. That's why I tried the .314s. Might I have a tight bore at the actual specification of .311.