Forster .257 Roberts Rimmed Headspace Field Gage
Precision headspace field gage for .257 Roberts rifles. Forster's exacting manufacturing ensures accurate chamber testing to verify safe SAAMI compliance and detect excessive headspace conditions.
Understanding Headspace and Chamber Safety
Headspace—the distance between the breech face and the cartridge base when the action closes—is critical to both rifle safety and accuracy. Excessive headspace creates dangerous conditions where unsupported brass can rupture during firing, allowing high-pressure gases to escape rearward with potentially catastrophic results.
The Forster Difference
Forster Headspace Gages are manufactured with meticulous attention to detail and exacting standards. Each gage is precision-engineered to provide reliable, repeatable measurements you can trust with your safety.
How to Use This Field Gage
GO Gage: If your rifle closes on the GO gage, the chamber accepts all SAAMI-specification ammunition safely.
NOGO Gage: If your rifle closes on the NOGO gage, the chamber may have excessive headspace and should be inspected by a qualified gunsmith.
FIELD Gage: If your rifle closes on this field gage, the chamber is dangerously close to or already exceeds SAAMI maximum specifications. This condition requires immediate professional attention.
Professional Standard
Most gunsmiths chamber rifles with headspace falling between GO and NOGO dimensions. This field gage helps identify chambers that have drifted beyond safe parameters, making it an essential tool for rifle owners and gunsmiths alike.
