I had two jams in the field with my SBII. I was using Federal wing shok 1500fps #5 birdshot. 1 1/4oz shot 4 dram. I beleive at the time I wasnt shouldering the weapon tight enough. One of the rounds stovepiped, the other was still inside the reveiver but the bolt was almost all the way open. I had to pull back on the handle and reach in and remove. My question is if your not shouldering it properly and it jams is that what you would typically see?