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Data errors
1. The 338 nm is a rimless cartridge, not rimmed. Follow the link provided.
2. If the 338-378 Wby has the 378 Wby as its parent, the 338-378's rim diameter should match the 378 Wby, it does not.
ELR Researcher (talk) 00:53, 11 February 2019 (UTC)