The only way to accurately measure and test the length of the chamber of the rifle. Essential when chambering a new barrel to ensure a tight, accurate, safe chamber. Whenever you buy a used gun, always check the headspace before firing. Gauges are etched with “Go” or “No-Go” and caliber/gauge name for easy identification. Both Forster and Clymer gauges are made to SAAMI specs.
In stock
Delivery time approx. 7-14 days. More than 10 pieces in USA warehouse
Delivery time approx. 7-14 days. More than 10 pieces in USA warehouse
Absolutely Essential For Accurate, Safe, Chamber Work
The only way to accurately measure and test the length of the chamber of the rifle. Essential when chambering a new barrel to ensure a tight, accurate, safe chamber. Whenever you buy a used gun, always check the headspace before firing. Gauges are etched with “Go” or “No-Go” and caliber/gauge name for easy identification. Both Forster and Clymer gauges are made to SAAMI specs.
Top takeaways
The HEADSPACE GAUGES - GO Clymer 300 WSM GO GAUGE is essential for measuring the chamber length of a rifle, crucial for safety and accuracy, especially when fitting a new barrel or buying a used gun.
These gauges are clearly marked with "Go" or "No-Go" and the caliber/gauge name, and are manufactured by Clymer to SAAMI specifications for reliability.
The product is machined steel and compatible with various cartridges within the same caliber family, such as .30/30 and Magnum cartridges, ensuring versatility across different firearm models.
Attributes
Cartridge:300 WSM (Winchester Short Mag),325 WSM (Winchester Short Mag),270 WSM (Winchester Short Mag)
Style:Go Gauge
Delivery weight:0.045kg
Shipping height:18mm
Shipping width:18mm
Shipping length:58mm
Item details
Made in USA
Customers reviews
Customer ratings (6)
3.5 / 5
Definitely recommended
No Problems 30/03/2017
works as advertized.
Definitely recommended
Safety First 09/03/2017
I purchase this Gauge after trying to locate a gunsmith near where I lived and worked to check the head space on my AR build. It was cheaper than a 2-3 hour drive and it work as it was designed.
Definitely recommended
Great tool for checking headspace 07/03/2016
I am new into building AR-15's. They are very easy to build and are like adult Lego's for me. It was suggested that I have an extra bolt carrier as a spare if you shoot a lot. So I assembled my bolt carrier with the Adam Arms Piston Bolt carrier and I used the BCM Bolt. To be safe and be certain there would be no bolt/bolt carrier failure, I wanted to make sure my head space was correct. I bought the Brownells Bolt Extractor tool (read review) and used the Go/No-Go units. They worked flawlessly. It took less than 30 seconds for each procedure. I know I can use the spare with no issues and not have to worry about head space. This is a must tool for peace of mind!
Not recommended
Hard to read identification on tool 06/03/2016
Identification should be engraved on tool. Ink is too light. I bought a go gauge and a no-go gauge. The ink on both tools is hard to read. Neither came with any instructions
Not recommended
Gauge Identification 03/03/2016
Gauge identification is not the best. Barely readable. Clymer should engrave the identification what the tool is into the body or head. These are my first and only set of headspace gauges. So I will know that they are 5.56. But to make sure not to confuse them. I will get some red and green paint and paint the ring in front of the head. Green for go gauge, Red for no-go gauge. I did not mic them yet. The identification ink is the only problem I've seen.
Recommended
Good product, no extractor cutout. 09/07/2010
I have to give it a good review because it's my fault. The extractor on my mosin nagant 91/30 absolutely won't budge. The go works fine but the no go obviously won't seat correctly without the removal of the extractor. Both (go and no go) look like fine tools but I can't rate them so much as I can say you DON'T have to remove the firing pin you DO have to remove the extractor so make sure you can do that before ordering them.
Ensure a safe chamber with the HEADSPACE GAUGES - GO CLYMER 300 WSM. Perfect for accurate measurement 🔍 and easy identification!
The Clymer No-Go Gauge is essential for checking the chamber length of rifles for safety and accuracy, particularly when fitting a new barrel or purchasing a used firearm.
These gauges are etched with "No-Go" and the caliber name, and are made to SAAMI specs to fit a range of cartridges including the 300 Remington Ultra Magnum.
Clymer's machined steel gauges are interchangeable among various calibers within the same Stock #, ensuring versatility and ease of use for different firearms.
The Clymer 22 Long Rifle Headspace Gauge Kit includes both Go and No-Go gauges for checking chamber length against SAAMI specifications.
These gauges are crucial for verifying the safety and precision of a chamber when installing a new barrel.
The kit comes with a convenient plastic case for storage and includes gauges made from precision-machined steel.
Clymer 5.56mm NATO Live Pilot Finish Reamers are made with durable M42 Cobalt HSS for increased tool life.
Features live pilot spindle with easy bushing attachment and oil grooves for efficient muzzle flush chambering.
Designed to SAAMI specifications with a 7/16” shank and compatible with standard bushings for customizable bore fitting.
The MANSON PRECISION 300 WSM GO Gauge ensures firearms have the SAMMI-recommended minimum chamber depth for safety.
Mixing brands of headspace gauges can lead to inaccurate readings due to tolerance stacking; it's advised to use the same brand for consistency.
The gauge is made from M7 high-speed steel, is in-the-white, and hardened for durability and a long service life.