Best Seller | Forster Products Headspace Gauges - Belted Magnum Field Gauge The only way to accurately measure and test the length of the chamber of the rifle. Essential when chambering a new barrel to ensure a tight, accurate, safe chamber. Whenever you buy a used gun, always check the headspace before firing. Forster gauges... ... more Forster Products Headspace Gauges - Belted Magnum Field Gauge The only way to accurately measure and test the length of the chamber of the rifle. Essential when chambering a new barrel to ensure a tight, accurate, safe chamber. Whenever you buy a used gun, always check the headspace before firing. Forster gauges... | | $36.99 go to store |