Thanks Dave! We've taken the bolt out and then apart and detailed it inside and out and lubed everything we could find.

I don't know about the buffer or checking it out. I'll have to do some research on that one. The jamming looks as if the bullet tried to enter the chamber too high and the bullet is getting pushed up to the top of the receiver and getting stuck there and not able to enter the chamber.

I don't want to hi-jack the thread though... LOL!