Forster Products 30-30 Winchester No-Go Gauge Features The Forster 30-30 Winchester No-Go Gauge is machined to precise SAAMI tolerances so it gives a reliable check that a chamber has not been reamed beyond the maximum acceptable headspace for .30-30 Winchester. Unlike the Go Gauge the bolt should not close on this one so any closure is an immediate signal that further chamber work or inspection is needed before the rifle is fired. This makes the No-Go Gauge a critical second checkpoint right after a barrel is chambered catching an over-cut chamber that a Go Gauge alone would miss. Gunsmiths use this pass or fail result to verify their reamer depth and confirm the job meets factory standards. The gauge is machined from hardened steel so its critical dimensions hold up under repeated use on the bench without drifting out of tolerance. At just half an inch across and one and a half inches long it stores easily alongside a full set of caliber-specific gauges in a shop tray or case. Beyond new-barrel verification this No-Go Gauge is useful for periodic maintenance checks on lever guns that see heavy round counts and for evaluating a used 30-30 rifle before a purchase. The Forster 30-30 Winchester No-Go Gauge is available for sale at GrabAGun as a dependable check for any serious gunsmithing bench. Forster Products 30-30 Winchester No-Go Gauge Specifications Manufacturer: Forster Model: 30-30 Winchester No-Go Gauge Type: No-Go Gauge Caliber: .30-30 Win Material: Steel Length: 1.5 Height: 1.5 Width: 0.5 Weight: 0.065 lbs Available At: GrabAGun