Mongoose333777

Sorry for the delay in responding, life gets in the way sometimes. I cleaned and polished the chamber real well. The military brass now can now be manually ejected, some more easily than others. The IWI brass is the toughest but it will eject. The NO-GO gauge allows the bolt lugs to partially engage and locks it up. I have to pry the carrier back through the mag well to get the gauge out. I want to thank everyone for their input and ideas. I never would have thought that polishing the chamber could make that much of a difference. Thanks again, Ric

Tripledeuce, I have a NO-GO gauge coming but I thought the reason for a NO-GO gauge was to check for excessive headspace. It appears my issue may be a tight chamber or cases requiring a touch more headspace than I currently have. I may also try polishing the chamber. Hopefully I won't need to have the chamber reamed. Guru, Thanks for the offer but I'm I Mission Viejo and travel south for work. Thanks everyone for the help.

Thanks everyone for you input. Just to reiterate, the rifle will chamber and fire factory loads, commercial case reloads and military case reloads without any issues. The problem occurs if I try to manually eject an unfired military case reload. All cases have been full length sized twice. Maybe I just need to use a small base sizing die, like survivalshop said. I have checked the headspace with a GO gauge and it was fine but I don't have a NO-GO or Field gauge. Thanks again for the input. I'll put some more rounds through it and see if it loosens up a little. If that doesn't work, I'll get a small base sizing die for the military brass. I'm really not looking forward to that after sizing 2,000 cases twice and swaging all of the primer pockets.

I built a 308 AR on an 80% DPMS pattern lower using a PSA AR10 upper, including the BCG. I also used the PSA AR10 carbine buffer, spring, and tube. I shot some commercial rounds through it to check functioning and then started using my reloaded ammo. From the beginning, it was difficult to manually eject a round but it has gotten much better. Now, with about 200 rounds through it, I'm still having issues if I need to manually eject a military cased round. I can eject commercial 308 cased reloads without any issues but it is impossible to eject a military cased reload. The only way to get it out of the chamber is to eject the mag and use a screwdriver to pry the bolt carrier back through the magwell. A few LC match cased cartridges can be manually ejected but they are difficult. All of the brass, both commercial and military, was prepared identically and was sized twice in the same die. I am unable to find any measurable difference between the two cartridges. I figure that maybe I have a tight chamber and there is a very small difference in the case head in the military brass. Maybe as I get more rounds through it, it will loosen up enough for the issue to resolve itself. Your thoughts? Thanks, Ric

New to 308 ARs but I have lots of experience with AR-15s. This is definitely a learning experience but enjoyable. Glad to be a member of the community.