Forster Headspace Gage 6.5 Creedmoor GO Length Rimless
The Forster Headspace Gage 6.5 Creedmoor GO Length Rimless is a precision measuring tool built for reloaders, gunsmiths, and shooters who need to verify that their rifle chamber meets SAAMI specifications. Proper headspace is foundational to safe, reliable firearms operation—it prevents case ruptures, misfires, and premature wear that compromise both function and shooter safety. Whether you're chambering a new barrel, doing routine maintenance, or evaluating a used rifle before purchase, this GO gauge confirms that your 6.5 Creedmoor chamber is within its minimum safe dimension and will reliably fire ammunition.
The GO gauge is the first step in a complete headspace assessment. It's designed to close on a properly chambered firearm; if the bolt won't close on the GO gauge, your chamber is undersized and the rifle won't function safely. This tool is machined to exacting SAAMI standards and constructed from hardened steel, so it maintains its accuracy and integrity through years of repeated use. It's compact and straightforward to use—no guesswork, no estimation.
Serious reloaders and gunsmiths rely on Forster gauges because they're built to tight tolerances and built to last. If you're working with 6.5 Creedmoor and want confidence in your chamber dimensions, this GO gauge belongs in your toolkit.
Key Features
- Machined to SAAMI specifications for 6.5 Creedmoor rimless cartridge
- GO length configuration confirms minimum safe chamber dimension
- Hardened steel construction resists wear and maintains accuracy over time
- Essential for barrel chambering, maintenance checks, and used rifle evaluation
Specifications
| Caliber | 6.5 Creedmoor |
| Gauge Type | GO Length |
| Case Style | Rimless |
| Material | Hardened Steel |
| Standard | SAAMI |
Frequently Asked Questions
What does a GO gauge do?
A GO gauge confirms that your rifle chamber meets the minimum SAAMI dimension for safe operation. If your firearm's bolt closes on the GO gauge, your chamber is within spec and will reliably fire ammunition. If the bolt won't close, the chamber is undersized and requires attention.
Do I need both GO and No-Go gauges?
The GO gauge alone tells you if your chamber is at or above minimum size. For a complete headspace assessment, many reloaders and gunsmiths also use No-Go and Field gauges to verify the chamber doesn't exceed maximum safe limits. This product is the GO gauge only.
What's the difference between GO and No-Go gauges?
The GO gauge checks minimum chamber dimension—your bolt should close on it. The No-Go gauge checks that the chamber doesn't exceed the maximum recommended headspace—your bolt should NOT close on it. Using both together gives you confidence that your chamber is within the safe operating window.
Can I use this gauge on any 6.5 Creedmoor rifle?
Yes, this gauge is manufactured to SAAMI specifications for the 6.5 Creedmoor cartridge and will work on any rimless 6.5 Creedmoor chamber.

