RCBS MatchMaster Trimmer Case Cover

The new 2026 RCBS MatchMaster Trimmer comes with its own case shavings cover, but in practice it is not very convenient: removing and reinstalling it takes too much time because it has to be unscrewed.

This model solves that problem with a bayonet-style connection, allowing the cover to be quickly removed and installed by hand without tools.

My personal recommendation is to print the model as two separate parts using different materials:

• the trimmer attachment, which is screwed to the main trimmer body, can be printed from PLA, ABS, or another rigid material;
• the cover itself is best printed from transparent PETG so you can easily see the amount of brass shavings inside.

This model was tested by trimming over 1000 cases and for now I don't see any issues