Pressure signs on a AR308

[M6A2REPR]

Your primers do not look that flat. I would measure the case head diameter. Anything over .472 you are getting up in pressure. Otherwise autoloader are just hard on the rim

[keatonskidmore]

Your primers do not look that flat. I would measure the case head diameter. Anything over .472 you are getting up in pressure. Otherwise autoloader are just hard on the rim

I'm thinking its just that the timing is off to where the bolt is starting to be unlocked before the bullet has made it out of the barrel so the pressure is still high in the chamber when the bolt is being pushed back. Therefore with the pressure still high its allowing the primer to flow and the extractor swipes.
Once I regulate the gas down to make the bolt stay in battery longer it should fix it or help it out greatly. If I still have some primer flow or swipes I'll move to a heavy buffer and spring.

[Tye]

Glad you got a direction to go in. Andrew is a great guy and a great gun builder.