L.E. Wilson Case Length Headspace Gauge, 8 x 57 JS Mauser Ring Diameter_1 Inch 308 Bullet Weight 150gr Bullet

308 Bullet Weight 150gr Bullet Style Open Tip Match (OTM) Bullet (B

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L.E. Wilson Case Length Headspace Gauge, 8 x 57 JS Mauser Ring Diameter_1 Inch 308 Bullet Weight 150gr BulletInherent with reloading is the potential to oversize your bottleneck rifle brass. And the most important use of a cartridge case gauge is for setting up 78" 14 press type full length resizing dies. Headspace of fired rifle cases can quickly and accurately be measured using this tool with a caliper. This one piece gauge will check overall length to indicate a need for trimming and datum to head length to assure correct headspace to prevent over sizing.