Gun started out as a eat everything 24" 2004? model, 2 3/4 chamber, no choke tubes, I hated it Finally chopped it off to 12" 4 days ago and followed all the info on this site I could find. Had 3 holes, opened them up to 3/32 with a little trough pointing towards receiver and added a 4th. Tried a couple different gas plugs made no difference as it should not. Put original back in and clicked her to #2 after 1 failed. I have ground and polished everything I see that might be binding, dragging etc. I even welded up gas port on LS of block letting no gas escape
After all that, the spent shell