Instructions for checking the headspace dimension: Headspace gauges are used to specify a maximum headspace for safety purposes using 'GO' and 'NO GO' gauges. Accuracy International Approved Headspace Gauge Part Numbers: .308/7.62x51. Attention: The Belted Magnum Family Case Gauge will headspace off the belt of the case, not the shoulders. If you are looking for a tool to measure Select the "Custom" option in the drop down menu and follow the instructions. Attention: The Belted Magnum Family Case Gauge will headspace off This affordable headspace gauge from Hornady Lock-N-Load Products (formerly Stoney Point) allows the handloader to measure changes to the Different headspace bushing sizes (depending on cartridge family) insert into the Hornady Lock-N-Load Comparator Body, which attaches to a caliper. Improper headspace may be dangerous to the shooter as well as an impairment to accuracy. The proper use of a Headspace Gage is the most reliable way to test the length of a Forster Headspace Gages are made to exacting manufacturing standards to ensure accurate testing of your rifle's chamber. I've seen an adjustable rifle headspace gauge somewhere about 20 or 30 years ago. At a show maybe? It was set up for .308, so the end had the correct shoulder angle, terminating in a 0.400 inch meplat that was the measuring surface. The Chinese do have their own headspace gauges that don't seem match other numbers exactly. Pacific Tool headspace gauge specs seem to be based on the Valmet specs which are easy to find on the internet. I just got my headspace gauges to go along with loading for an LR308 G2. Up till now, I had been oversizing my brass for the LR. I know it can be used on a resized case also. The Lyman instructions recommend it to be used with resized Each Headspace Gauge manufacturer works within a range specified by SAAMI. Manufacturer "A" may work at the high end of the range while Manufacturer "B's" If you have a Forster, .308 GO gauge, get a Forster, .308 NO GO. Use Clymer with Clymer and Manson Precision with Manson Precision, etc. Headspace Gauge found in: Hornady Lock-N-Load Headspace Gauge with 5 Bushings, Forster Headspace Forster Headspace Gage .308 Win - No Go 1.634. gunsmith knows that proper use of a bushing, surface contactor, shoulder contactor, headspace gauge and complete instructions. Find great deals on eBay for headspace gauge 308 and 308 headspace gauge set. Shop with confidence. Unfollow headspace gauge 308 to stop getting updates on your eBay Feed. You'll receive email and Feed alerts when new items arrive. .308 Ruger Precision: Enhanced M-Lok 20". The best way to check this critical dimension is with a Lyman case length/headspace gauge. The reloader simply inserts the case into the gauge to insure that it does not exceed the maximum or fall below the minimum allowable headspace. 184000045 .308 Field Gauge Valmistajan tuotenumero: FD308WIN Kentan mittarit ovat valttamattomia valineita, jotta varmistetaan turvallinen jaosto kaytetyt kivaarit. Hieman kauemmin sitten No-Go mittari kentan mittari kaytetaan mittaamaan ehdoton maksimi sallittu, Tallelokero jaosto headspace. 184000045 .308 Field Gauge Valmistajan tuotenumero: FD308WIN Kentan mittarit ovat valttamattomia valineita, jotta varmistetaan turvallinen jaosto kaytetyt kivaarit. Hieman kauemmin sitten No-Go mittari kentan mittari kaytetaan mittaamaan ehdoton maksimi sallittu, Tallelokero jaosto headspace. Forster Headspace Gauges