I have a buddy that is relative new to AR's and had one built by a local guy. It has a 20" Wilson Combat stainless barrel with a Wylde chamber and a carbine adjustable stock. The rifle functions fine, but the brass rim is being severely distorted by the extractor. He finds this with both premium hunting ammo (coyotes) and M193 from Lake City and IMI. I am inclinded to think that using a heavier buffer may help his situation by slowing down the cycle to hopefully buy a little more time for the pressure to fully drop. He would probably only go up to an H buffer to ensure functioning with standard .223 ammo. Would an extra power action spring also be a good option? Comments or other suggestions would be much appreciated. Thank you.
No. It's a M4 style adjustable with buffer tube.
Can you post pics or explain what type of damage is being done to the casing? What type of bolt carrier assembly? Are there any upgrades that have been done to the extraction system like heavy duty spring, insert, O-ring or D-ring? Have you tried any .223 ammunition, or only the 5.56 ammunition, as I am thinking possibly too tight of a chamber.
Greg Sullivan "Sully"
A heavier bolt carrier, heavier spring, H, or H2 buffer may help as you suggest by delaying extraction a split second. I'd also check the head space with a GO gauge just out of curiosity.