· Gone off to enjoy his twilight years
It's also an extractor issue. In a Contender or similar gun, you need a spring-loaded extractor so it can ride over the case body and still snap into the extractor cut on the case. That complication is averted with a rimmed round. I've had enough hassles with rimless rounds in the Contender that I will use such a cartridge only as an alternative to a rimmed round.