01-07-2024, 03:37 AM
Always check head space with any AR rifle and when changing bolts..https://pacifictoolandgauge.com/6-mm-69-...auges.html
Also check the ejector..Remove the bolt and push on the ejector to make sure it will push flush with the bolt face. I have seen bolts that were not machined properly and the ejector will not push flush with the bolt face causing head space issues..
Klem is correct about variances in chambers..The best check is with a function gauge that is machined to the lowest tolerance that meets spec..The negative with function gauges is very few people/ armorers/gun smiths have them..I have mine custom made with long handles so I can easily check chambers mounted to uppers..https://pacifictoolandgauge.com/function...gauge.html
It also could have just been a case that was out of spec..My favorite method to check loaded ammunition is the Sheridan slotted ammunition gauge..There is a viewing slot that allows access to see where the cartridge is out of spec..https://sheridanengineering.com/product/...ion-gauge/
Also check the ejector..Remove the bolt and push on the ejector to make sure it will push flush with the bolt face. I have seen bolts that were not machined properly and the ejector will not push flush with the bolt face causing head space issues..
Klem is correct about variances in chambers..The best check is with a function gauge that is machined to the lowest tolerance that meets spec..The negative with function gauges is very few people/ armorers/gun smiths have them..I have mine custom made with long handles so I can easily check chambers mounted to uppers..https://pacifictoolandgauge.com/function...gauge.html
It also could have just been a case that was out of spec..My favorite method to check loaded ammunition is the Sheridan slotted ammunition gauge..There is a viewing slot that allows access to see where the cartridge is out of spec..https://sheridanengineering.com/product/...ion-gauge/