450/400 N.E. 3'' CIP - 450/400 Mag. N.E. 3"1/4
Pacific Tool and Gauge offers five lengths of headspace gauges per rifle caliber on chambers listed by both SAAMI and CIP. In order from the shortest to longest, they are: GO/CIP-MIN, CIP-MAX, NO-GO, and FIELD. 0.0005" tolerance
Cross-compatibility: Many of our headspace gauges are compatible with multiple chamber specifications. For instance, .30-06 Springfield headspace gauges are usable in .25-06, .270 Winchester, 6.5-06, 8mm-06, .338-06, and .35 Whelen chambers. We list known compatible chambers with each headspace gauge product. Refer to our Compatible Headspace Gauge Chart below or ask your sales representative if your gauge is cross-compatible.
Our chart is available here: Headspace Compatible Chart