Recently installed a rebuilt recuperator. Everything seemed to fit and work until I went and fired.
Took 3 barrels; one fit perfectly and held in place for several hundred rounds. When installed, the other 2 popped the barrel door open after the second or third shot. Catching points on the trunion seem to be scratched and a little worn.
Need some help in determining if the issue is the recuperator or the trunion or something else.