Last Sunday I took the M96 Expeditionary in Bren configuration to the shoot we had up near Reading, PA. I had done the initial break-in the previous Thursday, firing 310 rounds through the rifle without any problems. I did not clean it after the break-in. Just tossed it back in its case.
On Sunday we put an additional 700 rounds or so through it, a mix of Barnaul 62gr and SA 55gr. No FTF or FTE problems were encountered. Function was reliable all day long.
Observations:
It is possible to fire the M96 significantly faster than an AR-15. I was able to shoot an entire 30 round magazine as fast as I could pull the trigger; literally 4-5 seconds for 30 rounds. It sounded like it was full-auto. No doubling, no feed problems. It ran perfectly smoothly.
The porting at the end of the bren barrel seems to have some value; combined with the heavy barrel it was possible to rapid fire as mentioned above and hold the rounds in an 18" target at 100 yards
The barrel is heavily fluted, and didn't seem to get excessively hot after 120 round strings.
Just about everyone at the shoot decided they needed a new M96
It's not me in the picture.