RCBS Rotary Case Trimmer Collet #4

The RCBS Rotary Case Trimmer Collet #4 is a precision draw collet designed for handloaders who demand repeatable accuracy in case preparation. This component fits into the RCBS rotary case trimming system and is specifically suited for trimming mid-range rifle and pistol brass to exact specifications.

The collet mechanism grips the case neck with precision-engineered surfaces, allowing the rotary trimmer's cutter to remove excess brass in a single smooth operation. Machined to tight tolerances, Collet #4 ensures case-to-case uniformity in trim length, which is critical for maintaining velocity spread and vertical shot groups.

This collet is particularly beneficial for reloaders preparing batches of match-grade ammunition or precision rifle cartridges, where case integrity directly affects performance. It integrates seamlessly with the RCBS rotary trimmer platform, allowing users to maintain a modular system without needing multiple dedicated trimmers.