Get true match-rifle performance out of your .308 builds with the Clymer Pull Through Chamber Reamer – .308 Winchester Complete Set, HS308WINSET. This professional PULL THROUGH CHAMBER REAMERS HS308WINSET kit is the same style of system long used by military armorers to cut minimum-length, tight headspace chambers on .30-caliber match rifles—giving serious shooters a real accuracy advantage. Primary Tactical+2Brownells Sverige+2
Purpose-Built for .308 Winchester Match & Precision Rifles
The HS308WINSET is a dedicated .308 Winchester pull-through chamber reamer set, engineered specifically to optimize chamber length and headspace on .308 rifles: Brownells France+1
Cartridge: .308 Winchester
Style: Pull-Thru Reamer Set (complete kit)
Manufacturer: Clymer – one of the most trusted names in chambering tools
If you’re tuning a precision bolt gun, tightening up a service or match rifle, or building a custom .308, this set is designed to help you achieve minimum, SAAMI-correct headspace for improved accuracy and brass life. Primary Tactical+1
Create Super-Accurate Minimum Headspace Chambers
The Clymer .308 pull-through system is designed to cut chambers with minimal headspace, which can benefit accuracy and consistency when done by a qualified gunsmith: Primary Tactical+2Brownells Sverige+2
Supports tighter, more consistent cartridge positioning in the chamber
Helps reduce case stretching and work-hardening, aiding brass longevity
Mimics the same approach used by military match armorers to give their shooters a competitive edge
By using the rifle’s own bolt as the “gauge” during pull-through reaming, the finished chamber is cut to optimal length for that specific action and bolt. Primary Tactical+2Brownells Sverige+2
Pull-Through Design – Uses the Rifle’s Own Bolt as a Gauge
Unlike conventional reamers used only from the breech, this system is designed as a pull-through reamer operated from the muzzle end while the bolt applies pressure from the rear: Primary Tactical+2Brownells Sverige+2
The gun’s bolt pushes on the reamer via a thrust bushing while you turn the drive shaft from the muzzle
As cutting progresses, the chamber gradually shortens toward minimum headspace
When the bolt finally “drops” and closes freely, you’ve reached the intended chamber length
This clever approach helps ensure the chamber is matched precisely to the bolt and receiver combination, which is especially valuable in high-accuracy .308 rifles.
Important: Clymer specifies that these tools are intended for experienced gunsmiths and must be used strictly according to the manufacturer’s instructions and safety guidelines. Brownells France+1
Finish Reamer Only – Final Tuning After Conventional Reaming
The HS308WINSET .308 P/T Reamer is designed to be used as a finish reamer only, not for rough-chambering from scratch: Primary Tactical+2Brownells Sverige+2
First, the chamber is cut close to spec using a standard .308 finish reamer
Then, the pull-through reamer is used to carefully bring headspace down to minimum length
This saves wear on the P/T reamer and provides fine control over the last few thousandths of chamber depth
Clymer’s improved design also cuts the shoulder, neck, and throat in one operation to help prevent neck crimping and ensure a smooth bullet transition into the rifling. Brownells Sverige+1
What’s Included – Complete HS308WINSET Kit
The PULL THROUGH CHAMBER REAMERS HS308WINSET is a complete set for .308: Primary Tactical+2Brownells France+2
Pull Through (.308) Chamber Reamer – purpose-built for .308 Winchester
Thrust Bushing – interfaces with the bolt to maintain controlled pressure on the reamer
Extension Shaft / Drive Rod
Clymer recommends using an appropriate T-handle on the extension shaft to apply steady, controlled rotation from the muzzle end. Primary Tactical+1
High-Speed Steel, Straight-Fluted Quality
Clymer chambering tools are known for their premium steel and precise geometry:
Manufactured from high-speed steel (HSS) for long tool life under proper lubrication and use Primary Tactical+1
Straight, right-hand cutting flutes designed to resist chatter and cut smoothly in rifle-grade steel Clymer Tool
Ground to SAAMI-spec .308 Winchester dimensions for correct chamber geometry and safe operation Brownells Sverige+1
With correct cutting oil, chip management, and technique, this set can deliver many precise chambers over years of shop service.
Made in the USA – Professional-Grade Gunsmithing Tool
According to item data and product manuals, the HS308WINSET .308 P/T Reamer Complete Set is: Brownells France+2Brownells Schweiz+2
Made in the USA
Packaged as a Pull-Thru Reamer Set with a delivery weight around 0.23 kg and a shipping length of about 775 mm, highlighting the included long extension shaft
Classified as a professional gunsmithing tool for match and precision rifles
Clymer’s reputation for chamber reamers, headspace gauges, and gunsmithing tools makes this kit a staple for shops that routinely work on high-end .308 rifles.
Ideal Applications – Where HS308WINSET Shines
The Clymer Pull Through Chamber Reamer Complete Set HS308WINSET is ideal for:
Precision bolt-action .308 rifles being set up for competition or long-range shooting
Match-service rifles where minimum headspace can help tighten groups
Custom builds where you want to extract maximum accuracy and brass life from .308 Winchester
Professional gunsmiths and advanced builders who understand proper headspace control and have the right fixtures, gauges, and experience
Used correctly, this system helps you produce super-accurate, minimum-headspace .308 chambers similar to those in top-tier match rifles. Primary Tactical+2Brownells UK+2
Key Specs – PULL THROUGH CHAMBER REAMERS HS308WINSET
From Clymer and major distributors: Primary Tactical+3Brownells France+3Brownells+3
Product Name: Clymer .308 P/T Reamer, Complete Set
SKU / Brownells # (example): 184300308
Manufacturer Part Number: HS308WINSET
Cartridge: .308 Winchester
Style: Pull-Thru Chamber Reamer Set
Includes:
Material: High-speed steel (HSS)
Standard: SAAMI-spec .308 Winchester chamber geometry
Use: Finish reamer only – for final, minimum-headspace tuning after conventional reaming
Country of Origin: Made in USA
Why Choose the Clymer HS308WINSET .308 Pull-Through Reamer Set?
Built specifically to cut minimum-length .308 chambers for match-grade accuracy
Uses the rifle’s own bolt as the functional gauge, matching chamber length to your exact action
Includes all critical components—P/T reamer, thrust bushing, and extension shaft—in one complete kit
Manufactured by Clymer, a leader in precision chambering tools, to SAAMI specifications
Intended for professional gunsmiths and serious precision builders who demand tight, consistent headspace
If you’re serious about squeezing every last bit of performance from your .308 Winchester match or precision rifle, the PULL THROUGH CHAMBER REAMERS HS308WINSET is the professional-grade solution designed to help you get there.
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