RCBS MatchMaster Trimmer Collet #4 .310/.605

Collet number 4 for the RCBS MatchMaster case trimmer. The collet is the part that clamps the case while the cutter works, so a trimmer collection tends to grow one collet at a time as cartridges get added to the bench.

This one carries the size marking .310/.605. Match it against the collet chart for your trimmer before ordering rather than going by the collet number on its own, and confirm the cartridges it covers while you are there.