I did a search for this particular problem, but didn't find one.  If you do find one just link it in this post. Thanks!
I was at the range and fired a total of 13 rounds through my 20 Gauge Slug Gun.  Out of 13 rounds only 4 ejected, the rest had to be done by inserting a rod through the barrel.  Anyone encountered this? I do not know if it was the type of shells I was using or something with the gun itself.  I was firing Hornady SST's 2 3/4.  Any help or information would be appreciated!