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Your cart is empty.Every gunsmith knows that proper use of a headspace gage is the most reliable way to test the length of a rifle chamber. “Headspace” is the distance between the face of the breech and the base of the cartridge when the action is closed, and excessive headspace can be dangerous as well as impair accuracy. For instance, unsupported brass fired in a rifle action with excessive headspace can rupture, allowing gas to blow rearward like rocket exhaust. Because your safety is on the line, Forster Headspace Gages are made with painstaking care and exacting manufacturing standards to ensure accurate testing of your rifle’s chamber. If a rifle closes on a GO gage, the rifle chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. If a rifle closes on a NOGO gage, the rifle chamber might have excessive headspace. Most gunsmiths chamber a rifle’s headspace between the GO and NOGO dimensions. If a rifle closes on a FIELD gage, the rifle chamber is dangerously close to or already over the SAAMI specified maximum chamber size.
Chris Coblentz
Reviewed in the United States on March 1, 2025
works as described.
Patrick Crow
Reviewed in the United States on February 14, 2025
Purchased this set to do as the name says. Started with the No-Go gauge bolt didn’t close as expected. Moved on to the Go gauge, bolt still would not close. Tried with a dummy round, bolt would close just fine. Got my caliper out and checked the specs of the gauges. Both of them were out of spec from what was printed on the side of the gauge by a significant amount. You can shoot your shot on them working for you but just know you run the chance of having to send them back.
Troy Ringle
Reviewed in the United States on February 12, 2024
Nice set at a good price
Spliner
Reviewed in the United States on April 14, 2023
The gauges seem to work fine for my new rifle barrel. The action closes on the Go gauge and doesn't on the No Go gauge. That's pretty much all they are good for, and seem to be in spec.
Michael Ladousier
Reviewed in the United States on April 2, 2020
Forster products have never let me down!
DieselDuc
Reviewed in the United States on September 5, 2019
I used these to check my head spacing(as the name suggests) on my build and they work as they should, and I’ve had no issues after a few hundred rounds.
Mike Bergquist
Reviewed in the United States on September 24, 2019
Works as advertised.
Customer
Reviewed in the United States on June 8, 2018
Great product.
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