The Clymer .22 LR “BENTZ” Semi-Auto Match Reamer (F22BENTZ) is a professional-grade rimfire chamber reamer engineered specifically to cut the proven .22 LR Bentz semi-auto match chamber. Designed for gunsmiths and serious rimfire enthusiasts, this reamer helps you create tighter, more precise chambers that reliably feed true match-grade ammunition in semi-auto .22 LR rifles—delivering improved accuracy without sacrificing function. Brownells UK+2Brownells UK+2
If you’re building or rebarreling a precision .22 LR, or upgrading factory barrels for better performance in platforms like Ruger 10/22–style rifles and other semi-auto rimfires, the F22BENTZ is the proven tool of choice. Brownells+1
What Is a .22 LR Bentz Semi-Auto Match Reamer?
The Bentz chamber is a semi-auto match chamber design that sits between a loose SAAMI “sporting” chamber and a very tight bolt-gun match chamber. It’s specifically optimized so that:
Match ammo chambers reliably in semi-auto rifles
Chamber dimensions are tighter than standard factory .22 LR chambers, enhancing accuracy
Feed reliability remains high with quality, true .22 LR match-spec ammunition mansonreamers.com+2mansonreamers.com+2
The Clymer .22 LR “BENTZ” Semi-Auto Match Reamer is ground to this geometry so you can cut or re-cut chambers that take full advantage of match ammo while maintaining semi-auto function.
Key Features – Clymer .22 LR “BENTZ” Semi-Auto Match Reamer F22BENTZ
Ensures Reliable Chambering of True Match Ammo in Semi-Auto Guns
One of the defining benefits of the F22BENTZ is that it “ensures reliable chambering of true, MATCH ammo in semi-auto guns.” Brownells UK+3Primary Tactical+3Yellowstone Armory+3
What that means in practice:
Match-grade .22 LR ammunition (typically built to tight, consistent tolerances) seats properly and consistently
The chamber supports enhanced accuracy and more uniform velocities
Semi-auto cycling remains dependable when the gun is properly tuned and maintained
For builders and gunsmiths who work on competition rimfire rifles, steel challenge rigs, or precision plinkers, a Bentz chamber is often the go-to choice because it strikes that critical balance between accuracy and reliability.
M-7 Tool Steel Construction – Built for Professional Use
Clymer builds this semi-auto match reamer from M-7 high-speed tool steel, chosen for: Brownells UK+1
Excellent toughness and wear resistance under continuous cutting
The ability to hold a sharp cutting edge over many barrels when properly lubricated and used
Stability and dimensional integrity under heat generated during cutting
For a gunsmith, that translates into long service life and consistent, smooth-cutting chambers barrel after barrel.
Finish Reamer Only – For Final Match Chamber Dimensions
The Clymer .22 LR Bentz F22BENTZ is a finish reamer, not a rougher. Brownells UK+1
That means it’s designed to:
Bring the chamber to its final dimensions and surface finish
Provide a smooth, uniform interior that enhances extraction and accuracy
Follow prior boring or rough-reaming operations where heavy metal removal has already been done (if required)
If you’re converting or re-cutting a factory .22 LR semi-auto barrel, this finish reamer is the tool you use at the final stage to deliver that precise Bentz chamber.
1/4" Round Shank – Compatible with Common Reamer Holders
The reamer features a ¼" diameter round shank, making it compatible with: Brownells UK+1
Standard reamer and tap handles
Many floating reamer holders used in lathe setups
Gunsmithing fixtures designed for rimfire barrel work
This ensures you can integrate the F22BENTZ into your existing tooling and chambering workflow with minimal adaptation.
Why Choose a .22 LR Bentz Chamber for Semi-Auto Rifles?
Compared to a loose factory sporting chamber, a Bentz match chamber can offer: mansonreamers.com+2mansonreamers.com+2
Improved accuracy – tighter control of case alignment and bullet transition into the rifling
More consistent headspacing and bullet seating
Better performance with premium match ammo that benefits from reduced “slop” in the chamber
At the same time, it is less tight than a bolt-gun only match chamber, helping to preserve:
Feeding reliability in semi-autos
Practical performance in real-world conditions (heat, fouling, varied lots of ammo)
That makes the Clymer F22BENTZ particularly attractive for Ruger 10/22-style builds, custom race guns, and high-end semi-auto rimfires used in competition and serious target work.
Ideal Users & Applications
The .22 LR “BENTZ” Semi-Auto Match Reamer F22BENTZ is ideal for:
Professional gunsmiths offering precision rimfire barrel chambering services
Builders of custom semi-auto .22 LR match rifles
Competitive shooters upgrading their own barrels under professional supervision
Shops specializing in Ruger 10/22, semi-auto match trainers, steel challenge, and NRL22-style builds
If your goal is to deliver match-grade performance from a semi-auto .22 LR while keeping function reliable with true match ammunition, this is the chamber reamer you’ll reach for again and again.
Technical Summary – Clymer .22 LR “BENTZ” Semi-Auto Match Reamer
Why Buy the .22 LR “BENTZ” Semi-Auto Match Reamer F22BENTZ?
If you’ve been searching for “.22 LR Bentz semi-auto match reamer,” “Clymer F22BENTZ,” or the best way to cut a Bentz match chamber in your .22 LR semi-auto, this reamer stands out because it offers:
Clymer quality and proven geometry for the classic Bentz semi-auto match chamber
Tough, long-lasting M-7 tool steel construction
A finish reamer design that delivers smooth, precise chamber surfaces
A versatile ¼" round shank compatible with common gunsmithing tooling
The ability to enhance accuracy and reliability in semi-auto .22 LR rifles using true match ammo
For gunsmiths and builders serious about rimfire performance, the Clymer .22 LR “BENTZ” Semi-Auto Match Reamer F22BENTZ is a cornerstone tool in any precision rimfire shop.
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