The RCBS High Capacity Case Trimmer Collet #1 (RCBS part no. 90353) is a replacement collet built for the RCBS High Capacity case trimmer, giving handloaders a secure grip on large-bore straight-wall brass during trimming. Collet #1 is sized for cases such as .50-70 Government, .50-90-2 1/2-inch Sharps Straight, .56-50 Spencer, .470 Nitro Express 3 1/4-inch, .500 Jeffery, and .500 Nitro Express 3-inch. Made by RCBS, a name handloaders have trusted for decades, this collet keeps big cartridge brass centered and steady so trim length stays consistent shot after shot. It’s a simple, inexpensive way to keep a High Capacity trimmer working correctly on oversized rifle cases.

Key Specifications

• Designated as Collet #1 for the RCBS High Capacity case trimmer.
• Compatible with .50-70 Government brass.
• Fits .50-90-2 1/2-inch Sharps Straight cases.
• Sized for .56-50 Spencer cartridges.
• Accommodates .470 Nitro Express 3 1/4-inch brass.
• Works with .500 Jeffery and .500 Nitro Express 3-inch cases.

Frequently Asked Questions

Does this collet fit standard rifle trimmers?
No — it’s built specifically for the RCBS High Capacity case trimmer and large-bore straight-wall cartridges.

What’s the difference between Collet #1 and Collet #2?
Collet #1 handles very large cases like .50-70 Govt and .500 NE, while Collet #2 is sized for cartridges such as .338 Lapua and .45-70 Government.

Buy the RCBS High Capacity Case Trimmer Collet #1

The RCBS High Capacity Case Trimmer Collet #1 ships fast from our Lubbock, Texas gun shop. Browse more case preparation tools from RCBS and other trusted reloading brands.