Yep thats right, I have purcased a S12. Got it back in June. The serial number starts with H12, so is this a 2012 model? I took it to the range last week to cycle some rounds throught it, this is what happened.
I started with Winchester AA Heavy Target 2.75" 3dr. eq. 1-7/8 oz 8 shot.
loaded five and it shot every round, but failed to eject the last round. Stovepipe.
Next I tried Winchester AA Light Target 2.75" 2.75dr. eq. 1-7/8 oz 7.5 shot
Loaded 5 and same, every round fired and ejected except for the last round. Stovepipe.
I shot another 15 rounds in groups of five, the last