Bring your revolver work up to true professional standards with the Clymer Pistol Chambering Reamer – Rimmed Finisher Style Reamer Fits .32 H&R Magnum Cylinder, SKU 184051320. Engineered for precision .32 H&R Mag cylinder chambering, this finisher reamer is built from premium M-7 high-speed steel and designed to deliver smooth, SAAMI-spec chambers that feed, fire, and extract reliably. Brownells+1
Whether you’re a working gunsmith or a serious hobbyist, PISTOL CHAMBERING REAMERS 184051320 is the dedicated tool you want when you’re cutting or correcting .32 H&R Magnum revolver chambers.
Purpose-Built for .32 H&R Magnum Revolver Cylinders
This specific Clymer reamer is not a generic pistol tool—it’s purpose-built as a Rimmed Finisher Style Reamer for .32 H&R Magnum cylinders: Brownells
Cartridge: .32 H&R Magnum
Reamer Style: Finisher – Cylinder
Intended Use: Chambering revolver cylinders in .32 H&R Mag
If you’re building a custom .32 H&R Mag wheelgun, re-chambering an existing revolver, or cleaning up out-of-spec chambers, this is the exact tool designed for that job.
Premium M-7 High-Speed Steel – Built for a Lifetime of Service
Clymer pistol chambering reamers are manufactured from best-quality M-7 high-speed steel, giving them the durability and edge retention professional shops demand: Clymer Tool+3Brownells+3Brownells+3
Material: M-7 HSS – hardened and drawn for long, reliable life
Fully guaranteed when properly used and cared for
Designed to give a lifetime of service in a gunsmithing environment
This high-grade steel resists wear, holds a sharp cutting edge, and helps produce clean, chatter-free chambers in tough steel cylinders.
Finisher Reamer – Final-Dimension, SAAMI-Spec Chamber
Within the Clymer pistol reamer family, you’ll find both roughers and finishers. This SKU, 184051320, is a Finisher Cylinder reamer, meant to bring the chamber to its final size and throat geometry: Brownells+1
Roughers (sold separately) are .010" smaller in diameter and do not cut the throat, saving wear on the finisher during high-volume work.
The Finisher reamer cuts the chamber to full SAAMI-spec dimensions and includes the throat.
If you’re only cutting a few .32 H&R Mag chambers, Clymer specifically notes that “a Finish Reamer is all you need,” making 184051320 ideal for small shop and custom work. Brownells+1
Professional Geometry – 6 Flutes, Solid Pilot, Integral Throat
Clymer Pistol Chambering Reamers are designed from the ground up for accuracy and stability in the cut: Brownells+2Brownells+2
6 right-hand cutting, straight flutes – smooth chip evacuation and reduced chatter
Solid pilot – keeps the reamer properly centered in the cylinder
Integral throat – throat geometry is ground into the tool for a smooth bullet transition into the forcing cone
Shank: Typically 7/16" diameter with 3/8" square drive on pistol reamers (¼" shank reserved for .22 RF models)
That geometry helps you produce true, concentric chambers with an excellent surface finish, which is critical for accuracy, brass life, and safe operating pressures.
Dedicated Cylinder Reamer for Rimmed .32 H&R Mag
When ordering pistol chambering tools, Clymer distinguishes between Barrel and Cylinder reamers. For revolvers, the pilot diameter must match the exit diameter of the cylinder, not the barrel bore. Clymer Tool+1
The 184051320 variant is:
This specialization ensures proper guidance and alignment in a revolver cylinder, giving you uniform chamber dimensions from hole to hole.
Compact, Shop-Ready Form Factor
From the Brownells spec sheet: Brownells
That makes this reamer easy to handle in a lathe or hand-held fixture, while still long enough to properly support and guide the cutting flutes in a revolver cylinder.
Made to SAAMI Specifications
Clymer emphasizes that these pistol chambering reamers are made to SAAMI-spec dimensions, ensuring compatibility with standard ammunition and reloading dies: Brownells+2Brownells+2
Helps ensure correct headspace when used with proper gauges
Promotes reliable ignition and extraction with commercial .32 H&R Magnum loads
Supports safe, consistent pressures when chambers are cut correctly
For the working gunsmith, that means less guesswork and more confidence that every cylinder you cut will function as intended.
Ideal Applications for PISTOL CHAMBERING REAMERS 184051320
This Rimmed Finisher Style Reamer for .32 H&R Mag cylinders is ideal for:
Custom revolver builds chambered in .32 H&R Magnum
Re-chambering or correcting factory cylinders that are out-of-spec, rough, or inconsistent
Refurbishing older revolvers where chambers have become pitted, tight, or inaccurate over time
Tuning revolvers for target shooting, small-game hunting, or concealed carry where reliability and accuracy are critical
With proper fixturing, lubrication, and headspace gauging, this tool will become a go-to solution for all your .32 H&R Mag cylinder jobs.
Key Specifications – PISTOL CHAMBERING REAMERS 184051320
From Brownells and Clymer: Clymer Tool+3Brownells+3Brownells+3
Brand: Clymer
Product Line: Pistol Chambering Reamers
SKU / Brownells #: 184051320
MFR #: F32HRC313
Cartridge: .32 H&R Magnum (rimmed)
Style: Rimmed Finisher Style Reamer – Fits .32 H&R Mag Cylinder
Material: M-7 High-Speed Steel
Flutes: 6, right-hand cutting, straight flutes
Pilot: Solid pilot, cylinder-specific
Throat: Integral throat
Shank: Pistol reamer shank (7/16" dia. with 3/8" square drive; .22 RF excepted)
Length: 5.000"
Weight: 0.200 lb
Standards: Made to SAAMI specifications
Use: Professional pistol/revolver chambering – revolver cylinder in .32 H&R Magnum
Why Choose the Clymer Pistol Chambering Reamer 184051320?
Cartridge-specific, cylinder-focused design for .32 H&R Magnum revolvers
Built from premium M-7 HSS for long life and consistent cutting performance
Finisher-style reamer that cuts full-dimension chambers and throats
SAAMI-spec geometry for reliable, accurate chambers every time
From Clymer, a trusted American manufacturer of precision chambering tools since 1958 Clymer Tool+1
If your shop works on .32 H&R Mag revolvers—or you’re building one of your own—the PISTOL CHAMBERING REAMERS 184051320 is the professional-grade finisher reamer that will help you cut clean, concentric, and reliable .32 H&R Magnum chambers for years to come.
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