NJ,
may be a late reply on this post but..
I've had a few fail to ejects with my SBE2 as well- specifically with the federal 1 3/8 oz No 5's (1500fps). Every other shell has cycled perfectly (~750 rounds, everything from 2 3/4 1oz to 3 1/2 BB). I've had 2 FTE's on the same day (30 rounds) and my buddy with a SBE2 lefty had the same problem (different box of shells).
I'm curious how others have had the shell jam- mine seems to eject the spent shell but it gets stuck horizontally (new shell blocked from chambering by the brass end of the spent one). Like I said its only happened a couple of times but thats two lost birds =)
1n