The RCBS Trim Pro 3-Way Cutter for .338 Caliber (RCBS part no. 90287) is a replacement cutting head that turns a single pass on the case trimmer into a full case-prep step. RCBS built it with a three-blade configuration that trims the case to length the same way a standard cutting tool does, but the inside blades chamfer the case mouth and an outside blade deburrs it at the same time. It’s the kind of accessory a reloader adds once and then wonders how they prepped brass without it, since it collapses three separate case-prep steps into one motion on the bench.

Key Specifications

• .338 Caliber is the caliber this cutter head is set up for, matching case-mouth diameter for .338 Caliber brass.
• Three-blade head trims, chamfers, and deburrs in the same pass instead of requiring three separate tools.
• Trims to length cutting the case mouth down the same way a standard case-trimmer cutting tool does.
• Chamfers the inside of the case mouth using the head’s inside blades as part of the same pass.
• Deburrs the outside of the case mouth with an outside blade, cleaning up the edge left by trimming.
• Universal fit lets this cutter head attach to any RCBS case trimmer, including both Case Trimmers and Trim Pro units.
• Caliber-specific pilots can be added to customize the cutter for additional cartridges beyond the one it ships set up for.

Frequently Asked Questions

What does this cutter head actually replace? It replaces running a case through separate trim, chamfer, and deburr steps — the three-blade head does all three in one pass on the trimmer.

Will this fit my RCBS case trimmer? Yes. It’s built to attach to any RCBS case trimmer, including both Case Trimmer and Trim Pro models.

Buy the RCBS Trim Pro 3-Way Cutter, .338 Caliber

Order the RCBS Trim Pro 3-Way Cutter for .338 Caliber from our Lubbock, Texas gun shop for fast, insured shipping. Pair it with the rest of our RCBS case preparation lineup to keep every case-prep step on the same bench.